I have a prototype of the web site for the Qt library archive at inqlude.org. I just updated with the latest content. All the data there is extracted from SUSE RPMs for now. The data needs a lot more love to be more complete, accurate and helpful for application developers.
As a next step I intend to go through the library meta data, add missing info, and also add missing libraries, so that there is an initial set of useful information on the web site.