I've been using this service for a while now (it was wikiposit before they came up with a snazzy interface, better API, and new name).

It's really useful and has a lot of datasets that are very hard to find for free elsewhere. As far as I can tell, they are mostly scraped (and I've noticed some breakage in the past when sites they're scraping change, which is annoying, but hey, can't argue with free)

Nice to see them keep expanding the offering.