Jester is a JavaScript library used for interfacing with REST APIs (XML and JSON). It assumes API conventions that match those defined by the Ruby (on Rails) library ActiveResource. While its most common use is within your own application, it can take advantage of JSONP to read from external APIs (such as Twitter).

This site is meant for issue tracking. Jester's mailing list can be found here, and its public website with a tutorial at jesterjs.com.