Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
Neofetch - Fancier version of Screenfetch that displays colors and supports more platforms.
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use
HWiNFO - Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. FREEWARE. download. Advertisements.
Advanced IP Scanner - Advanced IP Scanner shows all network devices, gives you access to shared folders, and can even remotely switch computers off. Download it Free.
Screenfetch - Simple command-line tool that displays your distro's logo in text art form, your OS version...