SimplePercussion is a small and free application with 47 percussion instruments that can play together in a loop of up to 70 beats (depending on your screen resolution).
SimplePercussion is very easy to use, but it can create even very complex percussion patterns. Just mark the boxes corresponding to the instrument(s) and the beat, and then press the play menu.
A moving vertical line shows the beat being played. You can save your percussion scheme in a file.
You can change beats/second, beats/loop, and beats/heavy vertical accent lines. SimplePercussion also works nicely as a simple metronome, but you don’t need this for a metronome.
If you are a percussion fun and you’d like to experiment on creating percussion patterns, then this program is for you.