6. Jump Desktop
Link: https://itunes.apple.com/us/app/jump-desktop-remote-desktop/id364876095?mt=8
The app is a paid one – $19.99. It’s been named the “best app for remote desktop control” by O’Reilly’s “Best iPhone Apps.” It offers secure connections to any computer, is Retina-optimized, offers simple setup and rich on-screen keyboard.