Hydrogen Drumkits for LMMS doubles or triples the library of drum samples and brings in a bunch of great sounds.
LMMS (Linux MultiMedia Studio) is a free cross-platform music studio which allows you to produce music with your computer. This application includes the creation of melodies and beats, the synthesis and mixing of sounds, and arranging of samples.
Expand sounds with plugins, synths, effects. 3 filter units, waveshaper, chorus, delay, reverb
