Horner Consulting
   Renovating support for legacy MPE operating systems and other compatible applications.
   http://www.hornerconsulting.com/

Relativity Technologies
   Offer application modernisation solutions to enhance legacy systems, as an alternative to implementing new systems.
   http://www.relativity.com/

Retro-Mation
   Software products, consulting and services that assist customers with their development and retro-fit projects.
   http://www.retro-mation.com/

Software Revolution
   Utilizes program analysis tools for automating the migration and transformation of legacy systems. Describes technologies employed and services offered.
   http://www.softwarerevolution.com/