Stave'n'Tabs - iOS and macOS notation and tablature editor with MIDI and MusicXML files support and chromatic...
Tonelib JAM - Create, edit, print and listen to tablature and guitar sheet music
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!
Aria Maestosa - Aria Maestosa is an open-source (GPL) midi tracker/editor.
alphaTab - alphaTab is a cross platform music notation and guitar tablature rendering library.
Midi Sheet Music - Convert MIDI Files to Sheet Music.