ResQNet

Develops graphical Java connectivity products that web-enable Mainframe and AS/400 systems and automatically present their screens as GUIs.
http://www.resqnet.com/

Innovative Software Solutions

Develops and maintains applications for the AS/400 platform. Also migrates and ports existing software and data.
http://www.webpgmr.com/

Alia Systems Limited

UK company performing bespoke software development for IBM mainframes, AS400, and UNIX systems. Also integrates legacy systems with emerging technologies.
http://www.alia.co.uk/

HOB, Inc.

Offers development to facilitate mainframe connectivity and encryption.
http://www.hob.de/www_us/

Mainframe Software Innovations

Application performance improvement specialists that reduce run-time and CPU-time of application programs in an IBM mainframe environment.
http://msinow.com/

H&W Computer Systems, Inc.

Develops system and application software for mainframes and PCs. Information about products and support.
http://www.hwcs.com/

Maintec Technologies

Offers training and development services.
http://www.maintec.com/

IT Doctors

Association of UK-based mainframe consultants. Highlights platforms and languages supported.
http://www.itdoctors.co.uk/