FANSI-CONSOLE by Hersey Micro Consolting, Inc. A special ANSI / VT100 video driver for MSDOS applications. Version 3 is now shareware, version 4 is (still ?) commercial. I own a full license and got both version 3.01k of 04.10.1991 and version 4.00j of 21.11.1991. Are there any newer versions out ?
THE LAST BYTE by Key Software Products. A special MSDOS “upper memory” manager for 386 / 486 / 586 boards with specially supported chipsets, so it just runs on selected computer mainboards. The shareware version may be turned into commercial versions by entering a serial number. I own a full license key and got version 2.11 of 11.08.1992 and version 2.50 of 30.08.1994. I am still looking for a newer version, there must have been such !
LDEVICE - Load Device Driver V2.0 by Adlersparre & Associates Inc., 1803 Douglas Street, Victoria, BC, Canada. A special MSDOS tool to load MSDOS device drivers at runtime.