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Ubuntu (http://www.ubuntulinux.org/) Kubuntu (http://www.kubuntu.org.uk/) Debian-based Linux distibutions that run on PowerMacs and PowerBooks. Ubuntu features GNOME desktop environment, while Kubuntu is based on KDE.
Debian (http://www.us.debian.org/) Free operating system for your computer.
Fedora (http://fedora.redhat.com/) The Fedora Project is an open source project sponsored by Red Hat and supported by the Fedora community.
Yellow Dog Linux (http://yellowdoglinux.com/) Yellow Dog Linux is Terra Soft’s most complete offering to date with support for the iMac G5s and Mac minis too! Yellow Dog Linux v4.0.1 is a Fedora / RPM-based operating system for PowerPC computers, offering an intuitive, flexible graphical installer, 1300 packages on 8 CDs (4 Install, 4 Source), a unified KDE and GNOME desktop environment featuring shared menus, applications, and user interface. (Thanks to Jay Savage for this link)
openSUSE (http://www.opensuse.org/)Linux distribution sponsored by Novell. (Thanks to Michael Cochez for this link)
OpenOffice.org (http://www.openoffice.org/) OpenOffice.org MacOS X port that requires X11.
NeoOffice/J (http://www.neooffice.org/) OpenOffice.org MacOS X port that doesn’t require X11.
AbiWord (http://www.abisource.com/) AbiWord is a free word processing program similar to Microsoft Word. It is suitable for typing papers, letters, reports, memos, and so forth.
Smultron (http://smultron.sourceforge.net/) Smultron is an open-source text editor written in Cocoa for Mac OS X Panther with many of the features that you might need. It features easy selection of the opened documents, line numbers, support for syntax colouring for many different languages, support for text encodings, code snippets, a toolbar, a status bar, HTML preview, multi-document find and replace with regular expressions, possibility to show invisible characters, authenticated saves, command-line utility, .Macsynchronisation of preferences and many more features.
iTeXMac (http://itexmac.sourceforge.net/) iTeXMac is an integrated software which components are: a text editor dedicated to D.E. Knuth’s TeX typesetting system, a frontend to a teTeX like distribution that includes TeX engines and tools.
Aquamacs (http://aquamacs.org/) Aquamacs is an Aqua-native build of the powerful Emacs text editor. By “Aqua-native,” we mean more than just the fact that this version of Emacs runs as a standard OS X application. Aquamacs features extensive customization that enables it to conform better with Apple’s standard Human Interface Guidelines (HIG) than standard versions of the editor do.
TeXShop (http://www.uoregon.edu/~koch/texshop/texshop.html) TeXShop is a TeX previewer for Mac OS X, written in Cocoa. Since pdf is a native file format on OS X, TeXShop uses “pdftex” and “pdflatex” rather than “tex” and “latex” to typeset; these programs in the standard teTeX distribution of TeX produce pdf output instead of dvi output. (Thanks to Jay Savage for this link)
MacDING (http://macding.sourceforge.net/) MacDING is an English ↔ German dictionary lookup program for Mac OS X. It is an implementation of Frank Richter’s DING (DIctionary Nice Grep) lookup program for Unix/Linux.
WordNet for Mac OS X (http://wordnet.sourceforge.net/) WordNet is an online lexical reference system (it’s a dictionary and much much more) developed at Princeton University’s Cognitive Science Laboratory under the direction of Professor George A. Miller.
GanttProject (http://ganttproject.sourceforge.net/) Project management application.
OmegaT (http://www.omegat.org/omegat/requirements.html) Memory translation tool.
kGTD (http://kinkless.com/kgtd) Essentially, kGTD is a single OmniOutliner document with some fiddly bits (ok, we can call them “buttons” if you are going to get all technical) that allow you to manage two views of your GTD tasks: projects and actions. You can archive completed projects to get them out of the way, and it should all look lovely in whatever colors and fonts you choose.
BibDesk (http://bibdesk.sourceforge.net/) BibDesk is a graphical BibTeX-bibliography manager for Mac OS X. BibDesk is designed to help organize and use bibliographic databases in BibTeX .bib format.
Task List (http://idisk.mac.com/gonfunko/Public/tasklist.html) Task List is the simple way to manage your homework. After all, it’s bad enough that you have to do homework in the first place - why should keeping track of it be difficult too? Task List 5 builds on the many features of Task List 4, and offers you even more ways to keep track of what you need to do. Even better, it makes it easy to actually do something about your homework, with features such as multiple file attachments for each task, a built-in tabbed notes editor, and convenient reference information and links, just like your composition notebook.
Bean (http://www.bean-osx.com/Bean.html) Bean is a light-weight word processor that supports live word count, backups, autosaving, page layout mode, etc.
* Skim (http://skim-app.sourceforge.net/) Skim is a PDF Reader and note-taker for OS X. Skim is designed to help you read and annotate scientific papers in PDF.
* Actiontastic (http://www.kaboomerang.com/blog/category/actiontastic/) GTD application.
Gimp.app (http://gimp-app.sourceforge.net/) A self contained application bundle of the GNU Image Manipulation Program for OS X.
Inkscape (http://www.inkscape.org/) Inkscape is an Open Source vector graphics editor, with capabilities similar to Illustrator, Freehand, CorelDraw, or Xara X using the W3Cstandard Scalable Vector Graphics (SVG) file format. (Thanks to Eric Hummel for this link)
Seashore (http://seashore.sourceforge.net/) Seashore is an open source image editor for Cocoa. It features gradients, textures and anti-aliasing for both text and brush strokes. It supports multiple layers and alpha channel editing. It is based on GIMP and uses the same native file format.
Pixen (http://www.opensword.org/Pixen/) Pixen is the best program for the pixel artist using Mac OS X. (Thanks to Ian Henderson for this link)
Album Shaper (http://albumshaper.sourceforge.net/index.shtml) Album Shaper strives to be the most friendly, easy to use, open source application for organizing, annotating, framing, enhancing, stylizing, and sharing your digital photos.
imgSeek (http://mortimer.hp.infoseek.co.jp/en/imgSeek.html) imgSeek is a photo collection manager and viewer with content-based search and many other features. The query is expressed either as a rough sketch painted by the user or as another image you supply (or an image in your collection).
Audacity (http://audacity.sourceforge.net/) Audacity is free, open source software for recording and editing sounds.
VLC media player (http://www.videolan.org/vlc/) VLC is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, etc.) as well as DVDs, VCDs, and various streaming protocols. It can also be used as a server to stream in unicast or multicast in IPv4 or IPv6 on a high-bandwidth network.
Blender (http://www.blender3d.org/) 3D graphics creation application. (Thanks to Nick Schoeneberger for this link)
Cog (http://cogosx.sourceforge.net/) Cog is an audio player for Mac OS X written with Cocoa. It supports many popular file formats, including Ogg Vorbis, Flac, Musepack, Mp3, and Monkeys Audio.
Juice (http://juicereceiver.sourceforge.net/index.php) Juice is the premier Podcasting application, allowing users to capture and listen to Internet audio programs anytime, anywhere.
DTV (http://participatoryculture.org/download.php) DTV is a new, free and open-source platform for internet television and video. An intuitive interface lets users subscribe to channels, watch video, and build a video library.
MP3 Sushi (http://maliasoft.appeule.com/us/mp3sushi.html) MP3 Sushi is a set of two applications: MP3 Sushi Server and MP3 Buddies. MP3 Sushi Server allows you to turn yourMac into a jukebox or a radio broadcast station in a few clicks. Thanks to the Rendezvous technology, MP3 Buddies makes it easy to find every jukebox and radio servers on your local network.
HandBrake (http://handbrake.m0k.org/) HandBrake is a multiplatform, multithreaded DVD to MPEG-4 ripper/converter. (Thanks to Avi Flax for this link)
Jahshaka (http://www.jahshaka.org/) The world’s first open-source realtime editing and effects system. Jahshaka takes advantage of the power of OpenGL and OpenML to give its users exceptional levels of performance. (Thanks to Jeff Greenberg for this link)
CenterStage (http://centerstageproject.com/) CenterStage is on open source project to build a powerful and intuitive media center application for the Apple Macintosh, this project was inspired by the launch of the Mac mini, an ideal Mac to use as part of a home theatre system.
Synfig (http://www.synfig.com/) Synfig is a powerful, industrial-strength vector-based 2D animation software package, designed from the ground-up for producing feature-film quality animation with fewer people and resources. While there are many other programs currently on the market to aid with the efficient production of 2D animation, we are currently unaware of any other software that can do what our software can. (Thanks to Daniel-Philipp Gona for this link)
ImagePlay (http://imageplay.sourceforge.net/) Run a series of effects on an image; tweak them, rearrange them, remove them, all without messing up the source image.
* MPlayerOSX (http://mplayerosx.sourceforge.net/) MPlayerOSX is binary distribution of MPlayer (The Movie Player for Linux) and comes with native GUI in MacOSX.
Firefox (http://www.mozilla.org/products/firefox/) Full-featured web browser.
Camino (http://www.caminobrowser.org/) The Camino web browser is powerful, secure, and ready to meet the needs of all users while remaining simple and elegant in its design.
Thunderbird (http://www.mozilla.org/products/thunderbird/) E-mail client that features intelligent spam filters, saved search folders, RSS support, privacy protection and much more.
Fugu (http://rsug.itd.umich.edu/software/fugu/) Fugu is a graphical frontend to the commandline Secure File Transfer application (SFTP). SFTP is similar to FTP, but unlike FTP, the entire session is encrypted, meaning no passwords are sent in cleartext form, and is thus much less vulnerable to third-party interception.
Cyberduck (http://cyberduck.ch/) An open source SFTP (SSH Secure File Transfer) and FTP browser licenced under the GPL.
OneButton FTP (http://www.onebutton.org/) OneButton FTP is a project with the goal of creating an open source graphical FTP client for Mac OS X (10.3.9 and above) using the Cocoa framework.
Colloquy (http://colloquy.info/) Traditionally, chat clients on the Mac have been anything but glamorous. Colloquy is an advanced IRC & SILC client which aims to fill this void. By adhering to Mac OS X interface conventions, Colloquy has the look and feel of a quality Mac application.
Adium X (http://www.adiumx.com/) A multi-protocol instant messaging client, which utilizes libgaim (the core part of gaim) to connect to multiple protocols, and is also based on a new plugin architecture. Partial address book integration, cool looking tabs, and multiple protocols for instant messaging.
RSSOwl (http://www.rssowl.org/) RSS/Atom/RDF reader.
Lucane (http://lucane.org/groupware/) Modular client/server groupware solution.
Nvu (http://nvu.com/) A visual web authoring softwar based on Mozilla Composer.
Joust (http://joustedit.sourceforge.net/) Joust is a simple yet powerful HTML editor programmed for Mac OS X using Cocoa frameworks. Includes live previewing and helpful programming tools.
Poisoned (http://gottsilla.net/) Poisoned is a file sharing application for Mac OS X. Poisoned may look like your average file sharing application at first glance, but it is so much more.
Vienna (http://www.opencommunity.co.uk/vienna2.html) Vienna is an open source freeware Mac OSX RSS reader with support for RSS/Atom feeds, article storage and management via a SQLite database, written in Objective-C and Cocoa.
OSXnews (http://osxnews.sourceforge.net/new/) OSXnews is a small fast, lightweight nntp news (usenet) client for OSX written from scratch in Objective C and Cocoa.
BitTorrent (http://www.bittorrent.com/) BitTorrent is not just a concept, but has an easy-to-use implementation capable of swarming downloads across unreliable networks. BitTorrent has been embraced by numerous publishers to distribute to millions of users. (Thanks to Eric Hummel for this link)
KisMAC (http://kismac.binaervarianz.de/index.php) KisMAC is a free stumbler application for MacOS X, that puts your card into the monitor mode. Unlike most other applications for OS X it has the ability to run completely invisible and send no probe requests.
Irssix (http://adlr.info/?Irssix) Irssix is a Free (GPL) irc client for Mac OS X. It is based on the fabulous unix irc client Irssi.
Azureus (http://azureus.sourceforge.net/) Azureus implements the BitTorrent protocol using java language and comes bundled with many invaluable features for both beginners and advanced users. (Thanks to Eric Hummel for this link)
BlogBridge (http://www.blogbridge.com/) BlogBridge is a Java-based open source news aggregator. (Thanks to David Coletta for this link)
Zimbra (http://www.zimbra.com/) Zimbra is an open-source server and client technology for next-generation enterprise messaging and collaboration. Zimbra delivers innovation for both the administrator and the end-user as well as compatibility with existing infrastructure and applications. (Thanks to Kevin Henrikson for the link)
Shiira (http://hmdt-web.net/shiira/en) Shiira is a web browser based on Web Kit and written in Cocoa. The goal of the Shiira Project is to create a browser that is better and more useful than Safari. Cocoalicious (http://www.scifihifi.com/cocoalicious/) A Cocoa del.icio.us Client for Mac OS X.
iStumbler (http://www.istumbler.net/) iStumbler is the leading wireless discovery tool for Mac OS X, providing plugins for finding AirPort networks, Bluetooth devices and Bonjour services with your Mac.
Feed (http://keeto.net/feed/) Feed is designed to work like a mail program and includes a simple single window interface. Individual articles are displayed directly in Feed using WebKit (the Safari web engine) which means less clicking and more reading.
* Cabos (http://cabos.sourceforge.jp/) Cabos is Gnutella file sharing program based on LimeWire and Acquisition.
* Transmission (http://transmission.m0k.org/) Transmission is a free, lightweight BitTorrent client. It features a simple, intuitive interface on top on an efficient, cross-platform back-end.
* SunriseBrowser (http://www.sunrisebrowser.com/en/) Light & fast. The open-source browser for web developer.
* MAMP (http://www.mamp.info/en/home/) The abbreviation MAMP stands for: Macintosh, Apache, Mysql and PHP. With just a few mouse clicks, you can install Apache, PHP and MySQL for Mac OS X.
CocoaMySQL (http://cocoamysql.sourceforge.net/) CocoaMySQL is an application used to manage MySQL databases (locally or over the internet). It lets you add and remove databases and tables, change fields and indexes, view and filter the content of tables, add, edit and remove rows, perform custom queries and dump tables or entire databases.
YourSQL (http://yoursql.ludit.it/) YourSQL is a simple but powerful program to create and manipulate MySQL databases. It is intended to be easy to use for the beginner as well as the more advanced user, and provides access to some otherwise underused, advanced features of MySQL, such as indices, InnoDB tables, multi-statement SQL scripts and multi-threaded handling of SQL dumps for backups or similar administration tasks.
Growl (http://growl.info/) Growl is a global notification system for Mac OS X. Any application can send a notification to Growl, which will display an attractive message on your screen. Growl currently works with a growing number of applications.
AppleJack (http://applejack.sourceforge.net/) Using AppleJack, you can repair your disk, repair permissions, validate the system’s preference files, and get rid of possibly corrupted cache files.
Preferential Treatment (http://homepage.mac.com/jonn8/as/html/pt.html) This application will check your preference files (both in your user’s preference folder and the system’s preference folder) for corruption by using the plutil
command line tool. If it finds suspect files, it will list the files and allow you to reveal them in the Finder or move them to the trash.
ClamXav (http://www.markallan.co.uk/clamXav/) ClamXav is a free virus checker for Mac OS X. It uses the tried, tested and very popular ClamAV open source antivirus engine as a back end.
OSXvnc (http://www.redstonesoftware.com/vnc.html) OSXvnc is a full featured VNC server providing remote access to the GUI, keyboard and mouse using any VNC client.
Chicken of the VNC (http://sourceforge.net/projects/cotvnc/) Chicken of the VNC is a VNC client for Mac OS X. A VNC client allows one to display and interact with a remote computer screen. In other words, you can use Chicken of the VNC to interact with a remote computer as though it’s right next to you.
Paparazzi! (http://www.derailer.org/paparazzi/) Paparazzi! is a small utility for Mac OSX that makes screenshots of webpages.
Hallon (http://hallon.sourceforge.net/) Hallon can create bookmarks in many applications (like iTunes) that usually can’t create bookmarks and they are always accessible from a menu whatever you are doing.
Mini vMac (http://minivmac.sourceforge.net/) Mini vMac emulates a Macintosh Plus, one of the earliest of Macintosh computers. It can run old Macintosh software that otherwise couldn’t be used on recent machines. (Thanks to Paul Pratt for this link)
Gmail+Growl (http://www.wootest.net/gmailgrowl/) Gmail+Growl is a plugin to the Mac OS X version of Gmail Notifier that shows you notifications using Growl when new mail is received.
TestDisk (http://www.cgsecurity.org/wiki/TestDisk) TestDisk is a powerful free data recovery software! It was primarily designed to help recover lost partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally deleting your Partition Table). Partition table recovery using TestDisk is really easy.
SvnX (http://www.lachoseinteractive.net/en/community/subversion/svnx/features/) SvnX is an open source GUI for most features of the svn client binary. It allows you to browse your working copies, spot changes and operate on them but also to browse logs and revisions of your repositories!
* Burn (http://burn-osx.sourceforge.net/) Simple yet feature-rich CD/DVD burner.
* The Unarchiver (http://wakaba.c3.cx/s/apps/unarchiver.html) The Unarchiver is a much more capable replacement for “BOMArchiveHelper.app”, the built-in archive unpacker program in Mac OS X. The Unarchiver is designed to handle many more formats than BOMArchiveHelper, and to better fit in with the design of the Finder. It can also handle filenames in foreign character sets, created with non-English versions of other operating systems.
* Check Off (http://www.carpeaqua.com/software/checkoff/) Check Off is a to-do list that sits in your menu bar. Simply click the check mark and your personal to-do list will drop down.
* Zpeg (http://www.zipeg.com/) An open source tool for browsing and extracting zip, rar, 7z, arj, lha, tgz, tar, and other archive formats.
Celestia (http://shatters.net/celestia/) The free space simulation that lets you explore our universe in three dimensions.
Stellarium (http://stellarium.sourceforge.net/) Stellarium is free GPL software which renders realistic skies in real time with openGL.
JDuplicate (http://jduplicate.sourceforge.net/index_EN.html) Client/server implementation of Scrabble and Duplicate.
Fish Fillets (http://fillets.sourceforge.net/) Fish Fillets NG is strictly a puzzle game. The goal in every of the seventy levels is always the same: find a safe way out. The fish utter witty remarks about their surroundings, the various inhabitants of their underwater realm quarrel among themselves or comment on the efforts of your fish. The whole game is accompanied by quiet, comforting music.
Freeciv (http://www.freeciv.org/index.php/Freeciv) A multiplayer strategy game (in other words, a Civilization clone).
Super Tux (http://super-tux.sourceforge.net/) SuperTux is a classic 2D jump’n run sidescroller game in a style similar to the original SuperMario games.
Vega Strike (http://vegastrike.sourceforge.net/) Vegastrike is an open source 3D Space Simulator. Current features include split-screen play, trading, exploration and of course plenty of shoot ‘em up action.
The Battle for Wesnoth (http://www.wesnoth.org/home) The Battle for Wesnoth is a turn-based strategy game with a fantasy theme. (Thanks to Nick Schoeneberger for this link)
Frozen Bubble (http://redivi.com/~bob/frozenbubble.html) Frozen Bubble is a popular free puzzle game (especially in Linux platform). User controls a small canon, shooting bubbles and tries to hit other bubbles so to create groups of 3 or more bubbles of the same color. (Thanks to Nick Schoeneberger for this link)
Nexuiz (http://www.nexuiz.com/) Nexuiz is a fast-paced, chaotic, and intense multiplayer first person shooter, focused on providing basic, old style deathmatch. (Thanks to Tim Papilionoidea for this link)
OSXplanet (http://www.gabrielotte.com/osxplanet.html) OSXplanet is a live desktop program based on xplanet.
CocoaFIBS (http://homepage.mac.com/agerson/cocoafibs/) CocoaFIBS is a Mac OS X native client for The First Internet Backgammon Server. FIBS is a free online community of backgammon players. People can play backgammon in real-time against real people and artificaly intelligent computer programs. Players of all skill levels are welcome. (Thanks to Arvind Grover for this link)
* Enigma (http://www.nongnu.org/enigma/) Enigma is a puzzle game inspired by Oxyd on the Atari ST and Rock’n’Roll on the Amiga. The object of the game is to find uncover pairs of identically colored Oxyd stones. (Thanks to William Coolman for this link)
* OpenTTD (http://www.openttd.org/) OpenTTD is a clone of the Microprose game “Transport Tycoon Deluxe”, a popular game originally written by Chris Sawyer. It attempts to mimic the original game as closely as possible while extending it with new features.
Freemind (http://freemind.sourceforge.net/wiki/index.php/Main_Page) Mind-mapping software written in Java.
DoubleType (http://sourceforge.net/projects/doubletype) DoubleType is an open source type designer (font editor) that builds TrueType font file.
jMemorize (http://www.riad.de/jmemorize/) jMemorize is a flash card application based on the Leitner system.
MacLibre (http://www.winlibre.com/wiki/doku.php?id=maclibre) MacLibre is an open-source software distribution for Macintosh. (Thanks to Pierre-Jean Coudert for this link)
AntiRSI (http://ozy.student.utwente.nl/projects/antirsi/) AntiRSI is a program for Mac OS X that helps prevent RSI (repetitive strain injury) and other computer related stress. It does so by forcing you to take regular breaks, yet without getting in the way. It also detects natural breaks so it won’t force too many breaks on you. (Thanks to Tim Papilionoidea for this link).
Cashbox (http://www.fadingred.org/cashbox/) Cashbox was designed from day one to be a quick and simple to use application for managing personal finances. As it has evolved, it has become more feature packed while keeping with the original goal of simplicity. Snö (http://www.ittpoi.com/sno/) Snö is a useless application that makes snow fall over your desktop. Snö is the Swedish name for Snow.
* Books (http://books.aetherial.net/wordpress/) An open-source book cataloging application for the Macintosh.