Have you heard of FalconStor Software? 

FalconStor Software, Inc., the leading developer of proven data protection solutions, today announced Single Instance Repository (SIR), a sophisticated de-duplication storage software service that facilitates efficient and scalable backup and archiving enterprise-wide. FalconStor SIR draws on FalconStor´s patented IPStor technology architecture to provide a policy-driven redundant data elimination (RDE) engine and object repository for backup and archive data designed to store only a single instance of each file or data block.

The innovative FalconStor SIR solution reduces backup costs and overhead by:

• Vastly reducing the storage requirements for backup and archiving
• Reducing WAN requirements for remote VirtualTape Library (VTL) replication for disaster protection purposes
• Analyzing, identifying, and storing only unique data blocks and files
• Providing optional encryption for increased security and reduced risks
• Allowing version tracking of files and objects within the data repository
• Providing system administrators with a faster data recovery path via new capabilities in file retrieval directly from the repository by version or time/date, without the need to go through the backup software
• Allowing seamless user-enabled recovery directly from the repository via the unique FalconStor File Recovery Agent
• Greatly expanding the amount of recovery points that can be kept on disk.

Read the entire press release, here.

If you are running VMware ESX Server, you can also check out FalconStor's VMware solutions.  They describe it as: 

FalconStor's Application Snapshot Director for VMware is a cost-effective, readily deployable solution that dramatically improves data protection of VMware ESX Server 2.5 virtual machines (VMs) by providing transactionally consistent recovery-an important enhancement to the crash consistency native to VMware. The result: significantly faster, reliable data recovery. Now VMware environments can easily meet critical business recovery time objectives (RTO) and recovery point objectives (RPO).

Key benefits include:

• Solves the need for transactional integrity of VMware snapshots, resulting in faster data recovery without the usual lengthy consistency checks
• Enables VMware environments to meet or exceed business RTO and RPO requirements 
• Simplifies disaster recovery
• Fully integrated, application-aware - coordinates with both VMware and the database, email, and file systems hosted on VMs
• Is compatible with all leading applications including Oracle, Microsoft Exchange and SQL Server, IBM DB2 UDB and Lotus Notes/Domino
• Cost-effective and easy to deploy 
• Easily integrates with existing VMware installations and storage investments; no costly reconfiguration required 
• Leverages proven, flexible FalconStor data protection technology

Check out their VMare solution, here.