Aldon Computer Group
- SCompare -- compares two or more files simultaneously, Harmonizer -- for shops which use third party software, merges new versions of software with older, modified versions. Analyzer -- testing analyzer.
- http://www.aldon.com/

Robelle Software
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- http://www.robelle.com

Productive Software Systems
- Robot/3000 source code cross-referencing utility. (Company formerly know as Diamond Software)
- http://www.prodsoft.com/

Tidal Software
- Librarian-iX version control/software configuration management system. (Company formerly know as OCS)
- http://www.tidalsoft.com

DIS International
- Online documentation for GNU programming tools for the HP 3000 standard with all HP 3000s with the MPE/iX POSIX shell. Tools include Make and CVS. CVS -- (Concurrent Versions System) a version control/software configuration management utility used by a
- http://www.dis.com/gnu.html

Whisper Technology
- Programmer Studio is a client server editor and integrated programming/development environment (EDI) for MPE/iX and other systems. Includes language syntax sensitive formatting, integrated compiler and error message support, and symbolic debugger suppor
- http://www.whispertech.com/