MadMapper - The Mapping Software
Resolume - Resolume is an application for live video performances.
VDMX - VDMX5 was created from the ground up to meet the demands of realtime video performance.
Linux Show Player - Sound player designed for stage productions
ArKaos GrandVJ - ArKaos GrandVJ is the finest video-mixing and live-performance software for VJs, DJs, musicians...
TouchDesigner - TouchDesigner is a visual development platform that equips you with the tools you need to create stunning realtime projects and rich user experiences.