DeviceLogics, Inc.: Makes DR-DOS, compact, Y2K safe, perfect for embedded or thin-client systems; source code available; development kits, older and localized versions; Breadbox Ensemble; NetWare.
OpenDOS Stuff: News, FAQ and mail archives.
OpenDOS Unofficial Page: Descriptions, Q&A, downloads, mail lists, programming information. Not up-to-date, but has useful information, some of historical interest.
The DR-DOS/OpenDOS Enhancement Project: Goal: continue development, enhance abilities of, add support for new standards to, extend life of this DOS under open source license. Descriptions, downloads of latest versions: source code, binaries, patches.
Unofficial DR-DOS Resources: Links, install and use tips, FAQ; mail lists, newsgroups, fora; downloads: images, source code; tools.