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.
With the advent of sandboxing and XPC services in OS X 10.7 and the enforcement of sandboxing in the Mac App Store the iMedia framework had to adapt to an even broader spectrum of deployment scenarios. These are systematically addressed in iMedia 3 (which is what you are looking at).
Read the Installation How To from the GitHub wiki.
Developers are welcome to work on enhancements and fixes! Please use the GitHub issue tracker.
There are plenty of things that need to be done, and your help would be appreciated!
Add support for Apple media library types such as Apple Photos libraries through Apple Media Library framework.
Initial release tag for iMedia 3