MadMapper - The Mapping Software
Resolume - Resolume is an application for live video performances.
Freej - FreeJ is an 100% free instrument for realtime video manipulation
VDMX - VDMX5 was created from the ground up to meet the demands of realtime video performance.
QLab - QLab, Live show control for Mac OS X.
ArKaos GrandVJ - ArKaos GrandVJ is the finest video-mixing and live-performance software for VJs, DJs, musicians...