Watchout is described as 'WATCHOUT multi-display software is your fast track to creating spectacular shows. Use WATCHOUT to compose and manage all the different media elements in your show – video, still images, animations, graphics, live feeds, sound – and then play it back on multiple displays' and is a projection mapping app in the video & movies category. There are more than 10 alternatives to Watchout for Windows, Mac, iPhone, iPad and Linux. The best Watchout alternative is Resolume Avenue. It's not free, so if you're looking for a free alternative, you could try QLab or MapMap. Other great apps like Watchout are MadMapper, VPT, HeavyM and SoundCue.