TeamViewer

TeamViewer provides easy, fast and secure remote access to PCs and Macs.

Get it here or get the iPad version here

Functions:
– Both spontaneous support and remote access to unattended computers are possible
– Convenient control via multi-touch gestures: left click, right click, drag & drop, scroll wheel, zoom, change monitor
– complete keyboard incl. special keys such as Ctrl, Alt, Windows®
– reboot the remote computer
– automatically decrease the screen resolution of the remote computer
– integrated partner list – see which computer or partner is online
– trouble-free use behind firewalls and proxy servers
– highest security standards: 256 Bit AES Session Encoding, 1024 Bit RSA Key Exchange
– the Free version of TeamViewer has exactly the same features as the Pro version. However, the license of the Free version is meant for private use only.

License:
TeamViewer is free for personal use, i.e. that you can use TeamViewer completely free of charge to access your private computers or to help your friends with their computer problems.