Freeplane - Freeplane is a powerful and free software for building mind maps.
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
SuperNotecard - Introducing SuperNotecard. SuperNotecard is an online writing tool that features virtual notecards to help arrange facts or scenes, track details, organize paragraphs, and clarify your composition process.
OwnTracks - Cross-platform location sharing