Workrave
From WPKG | Open Source Software Deployment and Distribution
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. Please refer to the feature comparison for a complete list of features, and how the program performs with respect to other programs on the market. The program runs on GNU/Linux and Microsoft Windows.
Available from http://www.workrave.org/welcome/. GTK no longer seems like it must be installed seprately.
<package
id="workrave"
name="Workrave - Help prevent RSI"
revision="2"
priority="0"
reboot="false">
<check type="uninstall" condition="exists" path="Workrave 1.9.4" />
<install cmd='%SOFTWARE%\workrave\workrave-win32-v1.9.4-installer.exe /sp- /silent /norestart ' />
<remove cmd='%PROGRAMFILES%\Workrave\unins000.exe /SILENT ' />
</package>