stretchly is cross-platform open source app that reminds you to take breaks when working with computer. By default, it runs in your tray and shows reminder window every 10 minutes, that is open for 20 seconds, containing idea for microbreak. Every 30 minutes, it shows window containing idea for longer 5 minute break. You can pause/resume reminding of breaks. On Windows and macOS, you can set app to start at login.
- better interface, good ideas, easily customised