Milligram - super small HTML UI framwerok

https://milligram.github.io/

Mobile app frameworks

http://ionicframework.com/  (angularjs,html5)
http://mobileangularui.com/ (bootstrap based)
https://framework7.io/ (material theme, ui components)
https://coronalabs.com/  (fot x10 times faster coding)
https://www.nativescript.org/  (native UI, JS - gera)
http://phonegap.com/

Google material design - bootstrap alternartyva

https://www.google.com/design/spec/material-design/introduction.html
http://www.getmdl.io/  lite
pvz, admin theme http://www.getmdl.io/templates/dashboard/index.html