I was wondering if there is a high-quality, (with open source software) listing of projects like the apache software foundation.
How about one that groups projects into domains, i.e. web frameworks, messaging, etc?
( I was looking for something to help pick open-source technologies for a particular problem when developing projects from scratch )
You might look into Ohloh. It lists quite a large number of project from across different project management sites. It categorizes them using tags.
It also provides stats on how active the projects are, which is often nice to see whether or not a project is still active.