They are mainly used within the ruote open source Ruby workflow and BPM project, but some of them have a life on their own, for example, the scheduler is used in Taskr a RESTful cron/at job scheduling server.

The project page on RubyForge : (download)

Since March 2008, the source code has been moved to github (source)

The mailing list for all these gems is at

The author’s blog :

recent blog posts

recent commits