Tool similar to Windows tracert.
Monitor and diagnose networks, detecting problems and bottlenecks with graphical data in real-time.
Utility that displays detailed information about wireless networks near you.
Comprehensive astronomy software with observation, simulation, and celestial body tracking features.
Mapping and GPS software for Windows, with 2D and 3D map visualization, editing, and analysis.

Free utility that allows you to tune and optimize your internet connection.