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MicrosoftExchange compatible server and client libraries
OpenChange is a portable Open Source implementation of MicrosoftExchange server and Exchange protocols. It provides a complete solution to interoperate with Microsoft Outlook clients or MicrosoftExchange servers.
OpenChange client-side library is used in existing messaging clients and is the solution in new projects to communicate natively with MicrosoftExchange and Exchange-compatible servers.
The purpose of this project, is to provide an open source replacement for all of MicrosoftExchange functionality. The product is delivered as an installable system that is fully functional and pre configured for use.
mimx is an open-source, drop-in replacement for corporate communication servers such as MicrosoftExchange and Lotus Notes. mimx provides e-mail, chat, fax, network news, calendaring, etc. to clients such as Microsoft Outlook.