vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
Mapple.me - Mapple.me bridges the gap between available time and availability of friends to increase social...
Freeplane - Freeplane is a powerful and free software for building mind maps.
OwnTracks - Cross-platform location sharing