Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
/Lunchbox - Coordinate lunch trips with colleagues and friends in Slack.
OwnTracks - Cross-platform location sharing
Capture - A great free screen capture utility that allows you to capture either a window or the desktop and save it to either a file or the clipboard.