Qtrainer is is made in C++ using Qt3 (trolltech.com). It works on Linux. Using the Qt3 version of windows it can be compiled on windows. Someone else did this a few years ago, but his server is down so there is no windows version available anymore.
EduKator is an educative project that I made as Thesis in High School (2004-2005). It was used in Spanish schools for some time.
EduKator works very well, but the code itself isn't the greatest, since it was my first big C++ project, and the first time I used Qt.
EduKator project started in November 2004
Last commit/change to the project: November 2005