Screentest is a CRT and LCD screen testing utility. Ever wondered how good the quality (sharpness, linearity, convergence, etc.) of your CRT/LCD monitor is? Screentest displays the testing patterns which you can use to evaluate the quality of your monitor.
Use the SourceForge Downloads page.
The screentest sources are maintained in a git repository. You can get the sources with git using this command:
git clone git://screentest.git.sourceforge.net/gitroot/screentest/screentest
You can also browse the repository with gitweb.
Click for a bigger picture.
Screentest is a postcardware+GPL: if you like it, you can send me a postcard (see the file AUTHORS in the distribution packages for my snail-mail address). The postcard is optional. The package is distributed under the terms of GNU General Public License, version 2.