I saw it in action using Renoise and got impressed of how easily you can create music.
Is there any other FREE plugins like hypersonic ?
Do you reccomend buying this plugin ?
Steiberg Hypersonic is 300 euro 
i don’t know of any free plugin like this one, and it looks good yeah, way better than bugged & non user friendly halion2…
you should also give a look to z3ta+ which is quite incredible 
by rgc audio