Sculptura - 3D sculpting for everyone
Zukitwo - Zukitwo is a Gnome Shell and GTK theme that currently works on Gnome Shell 3.14 and the latest version of GTK.
Nomad Sculpt - Nomad is a sculpting & painting mobile app, available on Android and iOS.
Dark Language - Holistic language, editor, and infra for building backends
PaintCube - Web-based 3D painting software
adapta-gtk-theme - An adaptive Gtk+ theme based on Material Design Guidelines - adapta-project/adapta-gtk-theme