NoMachine

NoMachine NX is an enterprise-class solution for secure remote access, desktop virtualization, and hosted desktop deployment built around the self-designed and self-developed NX suite of components. Thanks to its outstanding compression, session resilience and resource management and its integration with the powerful audio, printing and resource sharing capabilities of the Unix world, NX makes it possible to run any graphical application on any operating system across any network connection.

NX is SSH encrypted, has random cookie generation, and is compressed for speed. Free version is available to everyone, and enterprise and server editions are available at cost.

You can use NoMachine to:

Enjoy all videos, including HD movies, TV shows, and music files that are playable only on your computer
Play graphic intensive games
Remotely administrate unattended computers and give on-the-go support to colleagues and friends
Control your computers remotely as if you were sitting in front of them
Work with all your files, desktop applications and other programs all running on your computer elsewhere

Features:

Access all computers behind firewalls
High-resolution video and audio streaming
Transfer files in both directions
Record any activity on the remote desktop