I tried the shareware version from PCB Libraries. They are trying to build a community around their expertise on footprints. They look knowledgeable, but maybe a little too closely related to IPC. Anyway, they claim to support Diptrace, however their product only outputs in an importable file format. So it isn't directly compatible. The results are more than a bit iffy with very complicated splines and the pads appear to not even follow their own interpretation of correctness (every pad should be a rounded rectangle). In fact their D styled pads don't seem to have consistent arcs that line up with the various board layer types in Diptrace. Anyway, the lite version doesn't appear worth utilizing much less buying the full version. It seems slightly better coded than the Ultra Librarian .Net abortion from Accelerated Design, Inc.. In that it doesn't crash randomly or have a database full of duplicates. Ultra Librarian does export to many formats (again only import to Diptrace) and handles the bxl format that many manufacturers will release. So the Ultra Librarian Free Reader is worth having for its conversion capability though I don't think I would trust its full version with the supposedly huge library. Then again, they may keep it more up to date than the free web database. I guess I am doomed like most engineers to make my own drawings.