GitHub Project Management - No-fluff guide to building a collaborative development team
Sculptura - 3D sculpting for everyone
FoldersLint - Directory structure linter for JavaScript projects
Nomad Sculpt - Nomad is a sculpting & painting mobile app, available on Android and iOS.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
PaintCube - Web-based 3D painting software