Stave'n'Tabs - iOS and macOS notation and tablature editor with MIDI and MusicXML files support and chromatic...
Juicer - Juicer provides a solution to aggregate brands' hashtag and social media posts into a single social media feed on their website.
Aria Maestosa - Aria Maestosa is an open-source (GPL) midi tracker/editor.
Walls.io - Walls.io is an all-in-one social wall solution that allows you to collect, curate, and display content in an easy-to-customize feed. You can collect content from multiple social media platforms or let your audience post content directly on your wall.
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!
Curator.io - Curator is a brandable social media aggregator.