I had the same questions few months ago of someone who want to use
ableton live on stage and I proposed him to test TerminatorX :
http://terminatorx.cx/ It's really a strong tool, It's not 100%
equivalent but the guy I proposed him to use that instead of Abletonlive
was really happy of the performance of this software and finally he used
it for the work he had to do (it was a sound live for theater)!!
here an article in Brazilian :
And don't worry we know that brazilian are really strong into bring the
free software in civil society or any kind of activities!!!
this list is really a good place to exchange on audio & free software!!!