GUI for DOS

SEAL (also called XSeal ^[1]) is a 32-bit graphical user interface for DOS created by Michal Stencl.^[2] SEAL requires at least an Intel 80486, 8MB of RAM (although it may be possible to run SEAL on less, doing so is not recommended), a video card supporting 640x480 with 256 colors, 1.6MB of hard drive space, MS-DOS 3.0+ or equivalent (DR-DOS, PC-DOS, FreeDOS). SEAL is licened under the GNU GPL. It hasn't been under development since 2003. The last release, 2.0.11, came out 2002-04-11.^[3]

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.

OpenGEM is a distribution of FreeGEM, a graphical user interface (GUI) for DOS. OpenGEM is a non-multitasking 16-bit GUI.

Ikon is a 32-bit graphical user interface for DOS compatable systems, including FreeDOS. It is written from scratch using DJGPP and Allegro.

QubeOS is a multiplatform and multitasking desktop GUI system, developed in Slovakia. It was developed by Michal Stencl who also created SEAL GUI system.