AEC Design Group Develops and distributes AutoCAD-based software for the process plant and building services industries worldwide. http://www.cadpipe.com/

Alias ltd. Offers the Isogen software for plant design, as well as related modules for isometric presentation, data conversion, and 3D modelling. http://www.alias.ltd.uk/

Cea Technology Makers of the Plant-4D plant design application for AutoCAD and Microstation, and related software modules. http://www.cea-int.com/

Rapid-Draft Plant Design Software Plant Design Software electrical instrumentation P and ID specification-driven piping isometric and orthographic drawings for refineries shipbuilding industrial operating plants. http://rapid-draft.com

Rebis Industrial Workgroup Software Offers products for plant design, as well as systems to manage the full operational lifecycle of these facilities, including complete suite of integrated applications for piping, structural, process and instrumentation design and analysis, pipe stress and fluid flow analysis, and plant information management for autocad and microstation. http://www.rebis.com

Cymap Building Services Software Design software for HVAC, lighting and electrical design. Covers CIBSE/DIN/ASHRAE design standards, available in English, German, Hungarian http://www.cymap.com

Intergraph Process, Power and Offshore An Intergraph business unit offering CAD/CAE and data management applications for the process and power industries, such as Plant Design System PDS and SmartPlant. http://www.intergraph.com/ppo/

Camatic, Ltd. Software for plant and ship design and engineering, as well as for managing the maintenance during lifetime. http://www.cadmatic.com/

ETank, Inc. Software for calculating steel and aluminium storage tanks according to US standards, and management tools for plant equipment maintenance. http://www.etank.com/

Planon UK Ltd. Software and consulting, implementation, and training services for facility management. http://www.planon-fm.com/uk/