这只是一个关于IM系统架构与开发相关知识的简易list 。
0 最权威的资料，当然是来自 xmpp的： http://xmpp.org ， 列举有主要的服务端、客户端 和 库
服务端：
Name Platform(s) License Details| Apache Vysper | Windows / Linux | Apache License Version 2.0 | mina.apache.org |
| Citidel | Linux | GPL3 | citadel.org |
| CommuniGate Pro | Linux / Mac OS X / Windows | Commercial | communigate.com |
| djabberd | Linux | GPL3 | danga.com |
| ejabberd | Linux / Mac OS X / Solaris / Windows | GPL2 | process-one.net |
| IceWarp | Linux / Windows | Commercial | icewarp.com |
| iChat Server | Mac OS X | Commercial | apple.com |
| in.jabberd | Linux | GPL2 | inetdxtra.sourceforge.net |
| Isode M-Link | Linux / Solaris / Windows | Commercial | isode.com |
| jabberd 1.x | Linux | GPL2 | jabberd.org |
| jabberd 2.x | Linux / Solaris / Windows | GPL2 | jabberd2.xiaoka.com |
| Jabber XCP | Linux / Solaris / Windows | Commercial | jabber.com |
| Jerry Messenger | Linux / Windows | Commercial | j-livesupport.com |
| Kwickserver | Windows | GPL | kwickserver.info |
| Openfire | Linux / Mac OS X / Solaris / Windows | GPL | igniterealtime.org |
| Open IM | Linux | BSD | openim.techlab.smk.fr |
| Prosody | Linux / Mac OS X / Windows | MIT/X11 | prosody.im |
| psyced | Linux / Mac OS X / Windows | GPL2 | psyced.org |
| SoapBox Server | Windows | Commercial | coversant.net |
| Oracle Communications Instant Messaging Server | Linux / Solaris / Windows | Commercial | oracle.com |
| Tigase | Linux / Solaris / Mac OS X / Windows | GPL3 | tigase.org |
| Wokkel | MIT | wokkel.ik.nu | |
Showing 1 to 23 of 23 entries
客户端：
Name Platform(s) License Details| Adium | Mac OS X | adium.im | |
| Agile Messenger | Mobile | agilemobile.com | |
| AQQ | Windows | aqq.eu | |
| Ayttm | Linux | ayttm.sourceforge.net | |
| beejive | Mobile | beejive.com | |
| Beem | Mobile | beem-project.com | |
| BitlBee | Linux | bitlbee.org | |
| Bombus | Mobile | bombus-im.org | |
| BuddyMob | Mobile | buddymob.com | |
| Candy | Browser | amiadogroup.github.com | |
| Chatopus | Mobile | chatopus.com | |
| Citron | Windows | citron-im.com | |
| Claros Chat | Browser | claros.org | |
| Cleartext EIM | Linux / Mac OS X / Windows | cleartext.com | |
| climm | Console / Text-Mode | climm.org | |
| Coccinella | Linux / Mac OS X / Windows | coccinella.im | |
| Crosstalk | Mobile iOS | portablek.com | |
| Digsby | Windows | digsby.com | |
| eM Client | Windows | emclient.com | |
| emite | Browser | google.com | |
| Empathy | Linux | live.gnome.org | |
| Exodus | Windows | code.google.com | |
| Finch | Console / Text-Mode | developer.pidgin.im | |
| Gajim | Linux / Windows | gajim.org | |
| Galaxium | Linux | code.google.com | |
| glu | Windows | xeus-messenger.blogspot.com | |
| GNU Freetalk | Console / Text-Mode | gnu.org | |
| Gossip | Linux | developer.imendio.com | |
| iChat | Mac OS X | apple.com | |
| iJab | Browser | code.google.com | |
| IM+ | Mobile | shapeservices.com | |
| imov Messenger | Mobile | movsoftware.com | |
| irssi-xmpp | Console / Text-Mode | cybione.org | |
| Jabbear | Windows / Browser | jabbear.com | |
| Jabber Mix Client | Mobile | jabbermixclient.sourceforge.net | |
| jabber.el | Linux | emacs-jabber.sourceforge.net | |
| Jabbim | Linux / Mac OS X / Windows | jabbim.com | |
| Jabbim for Android | Mobile | www.jabbim.com | |
| Jabiru | Mobile | jabiru.info | |
| JAJC | Windows | jajc.jrudevels.org | |
| Jappix | Browser | jappix.com | |
| JBuddy Messenger | Linux / Mac OS X / Windows | zionsoftware.com | |
| Jeti | Linux / Mac OS X / Windows | jeti-im.org | |
| Jitsi (SIP Communicator) | Linux / Mac OS X / Windows | jitsi.org | |
| JWChat | Browser | jwchat.sourceforge.net | |
| Kadu | Linux / Mac OS X / Windows | kadu.net | |
| Kopete | Linux | kopete.kde.org | |
| Lampiro | Mobile | lampiro.bluendo.com | |
| m-im | Mobile | code.google.com | |
| mcabber | Console / Text-Mode | mcabber.com | |
| mChat | Mobile | smape.com | |
| Miranda IM | Windows | miranda-im.org | |
| Monal IM | Mobile | monal.im | |
| OctroTalk | Mobile | octro.com | |
| OneTeam | Linux / Mac OS X / Windows | oneteam.im | |
| OneTeam for iPhone | Mobile | oneteam.im | |
| Oyo | Linux / Mac OS X / Windows | bristowsoftware.co.uk | |
| Pandion | Windows | pandion.im | |
| Poezio | Console / Text-Mode | poezio.eu | |
| Pidgin | Linux / Mac OS X / Windows | pidgin.im | |
| Prodromus | Browser | forge.webpresso.net | |
| Psi | Linux / Mac OS X / Windows | psi-im.org | |
| Psi+ | Linux / Mac OS X / Windows | code.google.com | |
| Quiet Internet Pager (QIP) | Windows | forum.qip.ru | |
| qutIM | Linux / Mac OS X / Windows | qutim.org | |
| saje | Linux / Mac OS X / Windows | code.google.com | |
| Salut à Toi | Linux / Console / Text-Mode / Browser | wiki.goffi.org | |
| SamePlace | Browser | sameplace.cc | |
| Sim-IM | Linux | sim-im.org | |
| Slimster | Browser | slimster.org | |
| SoapBox Communicator | Windows | coversant.net | |
| Spark | Linux / Mac OS X / Windows | igniterealtime.org | |
| SparkWeb | Browser | igniterealtime.org | |
| Swift | Linux / Mac OS X / Windows | swift.im | |
| Synapse | Linux | synapse.im | |
| Talkonaut | Mobile | talkonaut.com | |
| Tigase Messenger | Browser | tigase.org | |
| Tigase Minichat | Browser | tigase.org | |
| Tkabber | Linux / Mac OS X / Windows | tkabber.jabber.ru | |
| Tlen | Linux / Mac OS X / Windows | tlen.pl | |
| Trillian | Windows/ Mac OS X / Mobile / Browser | trillian.im | |
| TrophyIM | Browser | code.google.com | |
| V&V Messenger | Windows | altertech.net | |
| Vacuum-IM | Linux / Mac OS X / Windows | vacuum-im.org | |
| Vayusphere | Mobile | vayusphere.com | |
| WeeChat | Console / Text-Mode | weechat.org | |
| WTW | Windows | k2t.eu | |
| Xabber | Mobile | xabber.com | |
| xmppchat | Browser | babelmonkeys.de | |
| Yambi | Windows | yambi.com | |
| Yaxim | Mobile | slideme.org |
Showing 1 to 91 of 91 entries
库：
Name Language(s) License Details| agsXMPP SDK | C# / .NET / Mono | Website | |
| AnyEvent::XMPP | Perl | Website | |
| as3xmpp | Flash / ActionScript | Website | |
| AXMPP | Ada | Website | |
| Babylon | Ruby | Website | |
| Blather | Ruby | Website | |
| cl-xmpp | Lisp | Website | |
| dojox.xmpp | JavaScript | Website | |
| Echomine Feridian | Java | Website | |
| Eiffel | PHP | Website | |
| emite | Java | Website | |
| exmpp | Erlang | Website | |
| gloox | C++ | Website | |
| headstock | Python | Website | |
| hsxmpp | Haskell | Website | |
| hxmpp | haXe | Website | |
| iksemel | C | Website | |
| IP*Works Internet Toolkit | ActiveX, C++, C#, .NET, Mono, Delphi, Java |
Website | |
| Iris | C++ | Website | |
| jabber-net | C# / .NET / Mono | Website | |
| jabber.py | Python | Website | |
| JabberLib | Tcl | Website | |
| Jabber Stream Objects (JSO) | Java | Website | |
| JAXL | PHP | Website | |
| Jreen | C++/Qt | Website | |
| js.io | JavaScript | Website | |
| JSJaC | JavaScript | Website | |
| libstrophe | C | Website | |
| Lightr | PHP | Website | |
| Loudmouth | C | Website | |
| Loudmouth | Ruby | Website | |
| Matrix | C# / .NET / Mono | Website | |
| Net::XMPP | Perl | Website | |
| oajabber | C++ | Website | |
| pyxmpp | Python | Website | |
| QXmpp | C++ | Website | |
| seesmic-as3-xmpp | Flash / ActionScript | Website | |
| SleekXMPP | Python | Website | |
| Smack | Java | Website | |
| SoapBox Studio | C# / .NET / Mono | Website | |
| strophe.js | JavaScript | Website | |
| Swiften | C++ | Website | |
| Tinder | Java | Website | |
| txmpp | C++ | Website | |
| Twisted Words | Python | Website | |
| Verse | Lua | Website | |
| XIFF | Flash / ActionScript | Website | |
| xmpp-psn | Python | Website | |
| xmpp4gwt | JavaScript | Website | |
| xmpp4js | JavaScript | Website | |
| XMPP4R | Ruby | Website | |
| xmpp4r-simple | Ruby | Website | |
| xmppframework | Objective C | Website | |
| xmpphp | PHP | Website | |
| xmppy | Python | Website | |
| StropheCappuccino | Objective-J | Website | |
| Z-XMPP | JavaScript | Website |
Showing 1 to 57 of 57 entries
【我主要关注 java, python的库，以及与android和ios相关的】
1 tcp/ip 协议，socket通信 , p2p
2 xmpp协议，jabber系统，及其实现：Openfire(wildfire)，ejabberd，Jabberd，DJabberd ；客户端 spark
3 服务器推技术，comet: pushlet
4 http长连接： tcp长连接
5 群组聊天，语音，视频，传文件： xmpp jingle , jingle nodes(erlang, java)
P2P NAT穿透 STUN TURN ICE SIP RTP/RTCP
6 资料
＋ 一个关于jabber的blog: [截止2009不再更新] http://hi.baidu.com/jabber (作者应该是Tim Yang)
＋ 关于http长连接的介绍： http://www.cnblogs.com/Roberts/archive/2010/12/05/1986550.html
＋ 关于服务器推的ibm dw文章： http://www.ibm.com/developerworks/cn/web/wa-lo-comet/
7 其他
应用集群， 分布式系统，多线程，高并发的应对方案 ，可靠性
转载： http://nodex.iteye.com/blog/1142156