Rebis is a leading developer of Windows based plant design tools. The company offers a complete set of integrated products for piping, structural, equipment, process, and instrumentation design; pipe stress analysis; and plant information management. Rebis has over 63,000 users, and controls a 55.3% share of the value priced plant design software market, as measured by Daratech, Inc. (a market research and technology assessment firm specialized in CAD/CAM, CAE, EDM/PDM).