"DR-DOS released DR-DOS 8.1 in the beginning of this month. But instead of an upgrade of the previous DR-DOS 8.0, it's something completely different. The kernel is a badly patched copy of the Enhanced DR-DOS kernel old version 7.01.06 without any credit to its author Udo Kuhnt. The other programs and drivers included are old versions of some popular open source, freeware and shareware products without licenses, documentation or even credit to their authors. This means that DR-DOS 8.1 is just a bunch of old tools plus a compilation of others' works, obviously sold without permission and in violation of their license terms."