mRemoteNC - mRemoteNC is the next stage of mRemote development
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
mRemoteNG - mRemoteNG is a fork of mRemote, an open source, tabbed, multi-protocol, remote connections manager.
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use
AnyDesk - AnyDesk is the world's most comfortable remote desktop application. Access all your programs, documents and files from anywhere, without having to entrust your data to a cloud service.
Zenmap - Zenmap is the official cross-platform GUI for the Nmap Security Scanner.