Duplicate IP Scanner shows a list with IP, Mac Addresses, and allocation type. Because the ARP Cache can be corrupted, you can also delete it with one click.
Duplicate IP Scanner is portable, so no installation is needed.
It's another simple, useful tool from Gaetano D'Aquila. Click on Scan to retrieve the list. Click Delete ARP cache to delete the cache.
You can close the program and delete it when finished.
Duplicate IP Scanner will show two false positives on VirusTotal, most likely due to an unrecognized app scanning your network information.
Complete Internet Repair does exactly what it says. It attempts to repair everything internet-related, including networking problems. Video tutorial and a portable version are also available.
With inSSIDer, you can inspect your Wi-Fi and surrounding networks, scan and filter hundreds of nearby access points, troubleshot the competing access points and clogged Wi-Fi channels, and more.
Simple Port Tester is a free program by PcWinTech.com to help users test if their ports are open with just a few clicks. Now supports 52 Languages. Portable version also available.