PixelKit is sharing their Bootstrap user interface kits. They’re free – licenced under Creative Commons Attribution 3.0 Unported (CC BY 3.0) (http://creativecommons.org/licenses/by/3.0/) and MIT License – http://opensource.org/licenses/mit-license.html.
Arctic sunset
https://github.com/Pixelkit/PixelKit-Bootstrap-UI-Kits/tree/master/arctic-sunset
Chubby stacks
https://github.com/Pixelkit/PixelKit-Bootstrap-UI-Kits/tree/master/chubby-stacks
Dark velvet
https://github.com/Pixelkit/PixelKit-Bootstrap-UI-Kits/tree/master/dark-velvet
Metro vibes
https://github.com/Pixelkit/PixelKit-Bootstrap-UI-Kits/tree/master/metro-vibes
Modern touch
https://github.com/Pixelkit/PixelKit-Bootstrap-UI-Kits/tree/master/modern-touch
Sweet candy
https://github.com/Pixelkit/PixelKit-Bootstrap-UI-Kits/tree/master/sweet-candy
Vanilla cream
https://github.com/Pixelkit/PixelKit-Bootstrap-UI-Kits/tree/master/vanilla-cream