boomerang is an opensource javascript library released under the BSD license. It depends on its community to keep it alive.
The source code is on github at github.com/lognormal/boomerang. Feel free to fork it and contribute to it. You can also get a tarball or zip archive of the code.
Use github's issue tracking system to report or follow bugs or to discuss features and get support.
Other opensource devs have incorporated boomerang into their own projects. The following is a partial list: