CrossDOS was published by the now famous Len Poma of Consultron Inc. originally in Plymouth Michigan. A town nearby to me.. I haven't seen Len in a few years. He was a member and former president of our Amiga users group.
Software Hut still sells CrossDOS 7 (
www.softhut.com).. It and CrossMAC still are very useful utilities today. 7 included a lot of file format conversion.