BreakTimer is described as 'Save yourself from RSI and eye-strain BreakTimer allows you to set up customizable breaks and will remind you to take them. BreakTimer is free and open source and available for Windows, macOS and Linux' and is a Prevent RSI app. There are more than 25 alternatives to BreakTimer for a variety of platforms, including Windows, Mac, Linux, BSD and PortableApps.com. The best alternative is stretchly, which is both free and Open Source. Other great apps like BreakTimer are Workrave, RSIBreak, Safe Eyes Linux and Time Out.
Workrave is a program that assists in the recovery and prevention of Repetitive Strain Injury (RSI). The program frequently alerts you to take micro-pauses, rest breaks and restricts you to your daily limit.
RSIBreak is a small utility to remind you to take regular short breaks. Repetitive Strain Injury is an illness which can occur as a result of continuous work with a mouse and keyboard. The risk of suffering injury increases the longer users work without breaks.
SafeEyes is an application that tries to protect your eyes from eye strain (asthenopia) by reminding you to take breaks while you're working long hours at the computer. It was created as a free and open source Linux alternative for EyeLeo, a Windows-only app.
It’s an utility that helps avoiding eyes-related problems when working at a computer for several hours. Concentrating your eyesight on a computer screen can cause an eye strain. You can prevent this by taking regular breaks during the work and look at distant objects.
Iris is software which makes monitors healthy for the eyes. With iris you can reduce the blue light emitted from your screen for better sleep, reduce the brightness of your screen without PWM and avoid eye pain.