Ethereal

Powerful network protocol analyzer for capturing, inspecting, and troubleshooting live and recorded traffic

Keep tabs and run reports on WiFi resources

Lightweight remote desktop tool for controlling computers, transferring files, and providing convenient remote support

Utility software for sharing an Internet connection through a computer's wireless card

Powerful, realistic network simulation tool for students, instructors, and professionals, despite occasional bugs

Free and simple software used to test your ISP's DNS server performance

Locates and adjusts the strength of wireless networks