Speccy - Speccy - find the details of your computer's specs. Great for spotting issues or finding compatible upgrades. Download the latest version free.
Wireless Network Watcher - scans your wireless network and displays the list of all computers and devices that are currently connected to your network.
HWiNFO - Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. FREEWARE. download. Advertisements.
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
AIDA64 - AIDA64 is a system information, diagnostics and benchmarking solution for Windows PC.
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use