PrettyTime Convert elapsed timestamps, like, “in 3 minutes!”

Features:

• Generate human-readable timestamps like, “right now”, “2 days ago”, or “3 months from now”
• Simple single interface – easy to learn.
• Entirely customizable. Provide your own TimeUnit and TimeFormat objects for complete control.
• Provided integration for the JSF web-application framework (if you would like to include another)

http://ocpsoft.com/prettytime/