Free untangle software for linux

Untangle Gateway Platform is a Linux-based network gateway with pluggable modules for network applications like spam blocking, Web filtering, anti-virus, anti-spyware, intrusion prevention, VPN, SSL VPN, firewall, and more.
- Commercial-grade open source alternative to SonicWALL and WatchGuard
- 14 integrated apps - use one or all of them
- Runs on off-the-shelf hardware
Enhancements:
- A package of 5.0.1 as a VMware Virtual Appliance has been released.

gPlanarity is a simple puzzle game involving untangling planar graphs for fun and prizes. If you tend to get addicted to cute little math puzzles than gPlanarity is a doozy.
gPlanarity is a super-clone of the flash Planarity game written by John Tantalo. The original Planarity ran well in IE and Firefox on other platforms, but was slow and liked to lock up or abort under Linux browsers.
gPlanarity implements gameplay identical to the original Planarity but adds some UI and game extras around the basic game such as multiple board generation algorithms, puzzle boards, complete backing state, group select/drag and so on.
Main features:
- Expand/shrink
- Group select and drag
- Board reset
- Level selection
- Complete backing state
- Leave and come back to any number of boards at any time
- Multiple level generation algorithms
- Puzzles with differing win conditions
- Hide/show lines
- Intersection highlighting
- Undeniable big noodly crunch!