Zoomable, recursive graph editor
Tweaks for Firefox for a cool "contextual" UI that only shows minimal info unless otherwise required
Git Extensions is a standalone UI tool for managing git repositories. It also integrates with Windows Explorer and Microsoft Visual Studio (2010/2012/2013/2015/2017).
Vimix is a flat Material Design theme for GTK 3, GTK 2 and Gnome-Shell etc.
Marko has a keyboard. Marko has a keyboard too.