Cool to see Bootswatch featured on Product Hunt! I'm the main author (though I get a bunch of help from the community in the form of bug reports and patches). This started as a weekend project to demonstrate the themeability of Bootstrap and grew into a resource meant to be useful to and used by other developers. Happy to answer any questions.
Nice to see more free templates for Bootstrap. I think these ones would be particularly well-suited for hackathons and rapid prototypes. There's a neat looking API too to integrate with any existing platforms you may be using.
Pretty cool - neat to see the different ways you can skin Bootstrap. Can't wait until there are more premium themes available for free, though they seem to be popping up.
Needledrop
Kitchenbowl
The Design of Influence: How to Craft Products that Move People
Brutal Teardowns