There is a good new one that is free: WinDataReflector Free (file synchronization and backup)
main strengthes of this one:
- visual comparison
- can run several backup jobs simultaneously in tabs
main draw back is that it doesn't support OS image creation, just folders and files.
There are so many backup software available but few days back I used an Office Password recovery tool. which helps me a lot in recovery of lost PST password. I had disappointed due to password lost because due to that I had to loss my PST files also. Then I used it and recover that. These are some definitive backup software.