These are not free but if you have them under windows, they work just fine in WINE: Tabledit, tabledit viewer (tablature editor and player, abc import, etc. -- A good application.) Abcmus (abc editor/player) Harbal (Equalization to improve audio, compare to stuff you like--I was quite surprized when this one played! Misidentifies the sound card but plays! The only audio app so far I found usable and in real time yet.) XGEdit (If you have an XG sound card, this one is handy. Caveat--the rightmost column of button showing the voices does not appear because the author is playing a few tricks, I suppose. Still usable to an extent, however.) These are free: AnalogX VPiano (computer keyboard plays MIDI. Could probably be of use using jack if this works correctly in WINE). DBPowerAmp music converter (Convert wav <--> MP3 -- works on right click or standalone under Windows, standalone using WINE. Very useful!)