Git-Repo - Manage Gitlab, GitHub and Bitbucket from the command line
Sketch - Professional digital design for Mac.
Gitential - Analytics for Git Repositories
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Diff So Fancy - Make Git diffs look good
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.