Question: must have windows rt apps?
Answer: Remote Desktop. This convenient app should not be missing from your RT tablet as it allows you to access your desktop, no matter where you are. ... 
Team Viewer. Team Viewer is another great free app to manage your desktop through the distance. ... 
OneNote. ... 
Kindle. ... 
Halo: Spartan Assault. ... 
Skype. ... 
Netflix. ... 
Google Search.