DOS/32 Advanced DOS Extender is a drop-in replacement for the DOS/4GW DOS Extender and compatibles. Being fast, small and flexible DOS/32A can be used in many environments, from embedded systems to DOS emulators, by both developers and end users alike.
HybridOS is a GUI Project that is loosely based on SEAL2, and uses a Multi-User System. Development is in C, using the Allegro Game Library 4.0.1.
OO extension to C
Dynace is a portable Object Oriented extension to C utilizing a meta-object protocol and generics. The OO features are similar to CLOS and Smalltalk (without their overhead) and solves many problems associated with C++.
Software to build extra language resource for existing software and software library packages and tools for language computing
Tyro is a very high level programming language designed mainly for the beginners of the programming. It makes life easier for the programming newbies.
DJGPP library for per-sector access to large disk drives >8Gb. It works via int13 BIOS extensions and can be used in any OS, which allows access to this service.