software for testing

I have buit the main circuit board w/ lcd and i am finishing up the buttons. Can anyone tell me the best way to figure if the darn thing works?
I am looking for a good and free software to use just for testing. Any suggestions. I built one simple trigger for testing. I brough it to GC and tried it on a Vdrum set and it worked great.
Any help would be great.
I am looking for a good and free software to use just for testing. Any suggestions. I built one simple trigger for testing. I brough it to GC and tried it on a Vdrum set and it worked great.
Any help would be great.