Wikipedia
IceWarp
IceWarp, Inc. is a software company located in Springfield, VA that provides messaging, voice and collaboration solutions for small, medium and enterprise level businesses. IceWarp has offices in the United States and the Czech Republic. The company has been in business since 1998 and as of 2013 is used by over 20,000 businesses around the world. IceWarp Messaging Server is IceWarp's core product which is used as an alternative to Microsoft Exchange.