EmailXtender - OTG - enhances MS-Exchange, Lotus Notes, and UNIX Sendmail by automatically copying every email and attachment into an enterprise message center, providing full-text search, and automatically classifying and transferring messages and attachments
Enterprise Vault - KVS - automatic, policy-driven, life-cycle management of information in Exchange stores
Remote Storage for Microsoft Exchange - Veritas - space management/optimization application that moves older message attachments out of the Exchange databases, information stores, and onto a secondary storage device, includes Data Anlyzer for Exchange, which interrogates information stores and graphically represents how much space those message attachments are taking up