RogueScanner
http://www.pcworld.com/downloads/file/fid,65454-page,1-c,lanutilities/description.html
License Type: Free
Operating Systems: Windows XP
File Size: 2700KB
Author: Network Chemistry
Check your wireless network for piggybackers and rogue devices.
Think your home or small office wireless network is safe? Do you have any idea whether there are any intruders on it? This free program is a great way to find out.
Run it on a PC attached to your network via Ethernet. (The program won't work in Windows Vista, so you'll need Windows XP.) When you run it, it immediately does a network scan, finding the wireless and wired devices attached to it. For each device, it lists the unique MAC address (a kind of serial number), the IP address, the manufacturer if it can figure it out, and model number if it can find that. It also tells you what kind of device it is, such as a router, printer, PC, and so on. And it will also flag any suspect devices it finds.
Just compare the information it finds to what you know of your network. If there are any wireless devices connected that you don't know about, you may have an intruder.
Pure Networks NetworkMagic.
Free version / Full version $29.95
Free version includes Wireless Connection Manager
http://www.networkmagic.com/download/
http://www.networkmagic.com/
http://www.laptopmag.com/Review/Pure-Networks-Network-Magic.htm
What this software does best is provide an overall picture of the network and of which clients are connected. Much more easily than in Windows XP or Vista, Network Magic lets you target specific folders for sharing and then get an overview of what printers and folders are being shared across the network. It issues alerts when new devices come onto the network and can even log network activity to detect outside piggybackers on your wireless network. Well-made wizards walk you through a lot of troubleshooting maneuvers like strengthening your network's security or restoring broken or poor Internet access.