Sunvox is out now and it is free for the N900 ..with has a lot of synths,effects and a nice gui http://www.warmplace.ru/ you can download it from http://www.warmplace.ru/soft/sunvox/sunvox.zip...(link corrected) and you have to install libgles1 by "apt-get install libgles1" you may have to deactivate all repositorys except of the nokia system one.. now we have a very nice synth for the n900:-) http://www.youtube.com/watch?v=OIFRLTqInbY