We’ve recently been in contact with the folks at PCB Libraries (See this thread for history). They sell a footprint generator for many common (and less common) types of footprints.
They’ve decided to make the KiCad version of their software free for use. A couple people on the KiCad team have had a look at the generated footprints and they seem of decent quality. But we haven’t tested extensively.
If anyone is up for it, I would love to get more feedback on this tool. Setting up the license tripped me up but there are instructions posted here. The footprints are not eligible for inclusion in the KiCad library due to their licensing constraints but they may be useful for KiCad users.
Please let me know if you do test this tool and find any issues with the KiCad footprints it generates.