Stand-alone parallax scrolling library for mobile (Android + iOS) and desktop. No jQuery. Just plain JavaScript (and some love). http://prinzhorn.github.io/skrollr/

12 Kb.
Looks great on mobile devices too.

http://prinzhorn.github.io/skrollr/
- demo

Warning:
«...skrollr hasn't been under active development since about September 2014 (check out the contributions graphs on https://github.com/Prinzhorn/skrollr/graphs/contributors) and I don't have any plans for doing major changes to it.»

Issues.
https://github.com/Prinzhorn/skrollr/issues
- lots of.

https://github.com/Prinzhorn/skrollr/wiki/Tips/
- tips.

https://github.com/Prinzhorn/skrollr/wiki/Common-Issues
- FAQs.

https://github.com/Prinzhorn/skrollr/wiki/In-the-wild
- examples.

Other libraries:
http://prinzhorn.github.io/skrollr/examples/gradientsmotherfucker.html
- demo.