This is the iMedia Browser framework that is used by a number of applications (and as the basis for a stand-alone utility). Developers are encouraged to include this in their application as long as there is proper attribution.
The master is currently at the "2.0" phase, with compatibility for 10.5 and 10.6. For the older 1.x branch, which is not being maintained, you can get it from subversion:
svn checkout http://imedia.googlecode.com/svn/trunk/ imedia-read-only
Soon we plan on working on code that requires 10.6 and may take advantage of 10.7 features. We will probably split off a branch for that development until it is stable, and then move that to master. (We will have a 10.5-compatible branch available by that time.)
Developers are welcome to work on enhancements and fixes! We are still using the old Google Code issue tracker for now. There are plenty of things that need to be done!