KGuitar is basically a guitar tabulature editor for K Desktop Environment. It's much more than just a tab editor. It's features are:
Powerful and convenient tabulature editing, including many effects and classical note score editing for classic instrument players;
Full and very customizable MIDI to tabulature import and export;
Support of extra data formats, such as ASCII tabulatures, MusicXML or popular programs' format, such as Guitar Pro's or TablEdit;
Chord fingering construction tools - chord finder and chord analyzer;
Many additional facilities to ease tabbing work, including rhythm and lead construction tools;
Highly customizable to suit a lot of possible instruments (not only 6-string guitars, and even not only guitars), including drum tracks, lyrics and other MIDI events.