Muzli - UI/UX and Design Inspiration Chrome Extension
Zukitwo - Zukitwo is a Gnome Shell and GTK theme that currently works on Gnome Shell 3.14 and the latest version of GTK.
UI Garage - Specific mobile and web design patterns for your inspiration
Dark Language - Holistic language, editor, and infra for building backends
Design Hunt - Curated design inspiration for everyone
adapta-gtk-theme - An adaptive Gtk+ theme based on Material Design Guidelines - adapta-project/adapta-gtk-theme