UVI Falcon - Sampler/synth hybrid instrument
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Pianoteq - Pianoteq is a virtual piano that runs on your computer.
keezy - A colorful soundboard. Play with music.
LinuxSampler - LinuxSampler - free, open source pure software audio sampler with professional grade features.
G-Stomper Studio - G-Stomper Studio is a feature-packed, mobile music production tool.