FluffyChat - Open. Nonprofit. Cute ?
Essential JS - 60+ stunning, feature-rich JavaScript UI controls
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
Dojo Toolkit - Dojo Toolkit
Molly (Signal fork) - Molly is an independent Signal fork for Android
Kendo UI - Fast, light, complete: 70+ jQuery-based UI widgets in one powerful toolset