FreeGEM is a computer GUI based on Digital Research's GEM which was first released in 1985. GEM stands for "Graphical Environment Manager". FreeGEM is the free software/open source version of GEM developed after Digital Research released the GEM code under the GPL free software licence.
FreeGEM code works on almost every version of DOS, and runs on almost every IBM compatible PC.
The FreeGEM development teams are working on making the DR GEM code more functional, and on providing programming support. Anyone with an interest in FreeGEM should join the GEM Development mailing list, where all the FreeGEM programmers can be found. You can download all the FreeGEM binaries and source code in one package through the OpenGEM SDK. The OpenGEM SDK also contains language bindings, documentation, and compilers. There are additional FreeGEM resources available through John Elliott's GEM website (see external links below).
OpenGEM is the most popular FreeGEM distribution. Other distributions include Owen's FreeGEM Distribution, and FreeGEM 3.00b. OpenGEM is currently the only maintained distribution.