Cons: cannot do the following: Synchronize 2 PCs, verify backup
OS: All flavors of Windows including Windows XP, 2003, Vista, 2008, Windows 7 (Supports both 32 and 64 bits Windows)
FBackup is absolutely free and can be used for personal and commercial files. It backs up automatically to your USB or Firewire device in either local or network location. You may opt to compress the file in zip format or copy it as is.
Cons: Cannot do the following: true remote backup, run backup as service, volume shadow copy, synchronize 2 PCs, verify backup
OS: All flavors of Windows including Windows XP x86 SP2, Windows XP x64 SP2, Windows Server 2003 x86, Windows Server 2003 x64, Windows Vista x86, Windows Vista x64, Windows Server 2008 x86, Windows Server 2008 x64, Windows 7 x86 or Windows 7 x64