In spite of being designed by guitar players and for guitar players, TablEdit also has support for many other instruments like drums, harmonica, violin, flute, or banjo.
The program will let you import files in any of the following formats: ASCII, MIDI, ABC, MusicXML, Bucket O' Tab, TabRite, and Wayne Cripps. The files you create or edit can in turn be saved or exported to ASCII, HTML, ABC, RTF, MIDI, Lilypond or even WAV, and playable with almost any audio program.
TablEdit is a very complete tool for musical notation that lets you create sheet music for all kinds of instruments, export or print them with one click, and above all, give your creativity free reign with a very easy-to-use interface.
Has some limits on features.