AirServer - Most advanced screen mirroring software receiver for Mac, PC and Xbox One.
ControlPlane - Manages configuration profiles for your Mac. Determines where you are or what you are doing based on a number of available evidence sources and then automatically reconfigures your Mac based on your preferences.
DNS Heaven - Unifies macOS DNS so applications using glibc can resolve DNS with the native stack. Mainly for use with VPNs.
HTTrack - Useful tool for downloading a whole website and offline browsing.