Stave'n'Tabs - iOS and macOS notation and tablature editor with MIDI and MusicXML files support and chromatic...
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Chordsheet Maker - Create chord sheets or lead sheets quick and easily from your iPad. Add rhythms, endings, segno, codas and all what's necessary for your musicians to know what's your music about. Transcription made easy!
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
Aria Maestosa - Aria Maestosa is an open-source (GPL) midi tracker/editor.
SourceTree - Mac and Windows client for Mercurial and Git.