Nandroid Browser browses Nandroid backups for individual extraction
If you've ever realized after you flashed a new ROM on your HTC EVO that you were missing an application or some data but didn't want have to back up your current setup, restore the old Nandroid, save the data, and revert back to your newer backup, then Nandroid Browser by Paradise Android could be the tool for you.
It's a new application for rooted phones that allows you to view and extract selected data from your Nandroid backups. You can easily open, save, Dropbox, or email apps/files/whatever content you choose to extract.
Nandroid Browser supports ClockworkMod backups and some compressed Nandroid formats. Unfortunately, TWRP compressed backups doesn't seem to be one of them.
It should support most backups that utilize the yaffs2 or compressed ext4 formats, though, so hopefully more recoveries will be added soon.
Until we get a smarter recovery that allows the same functionality, this might be the best way to get at your backups without ever having to reboot your phone or restore an old backup.
Links: Market (EVO) | Market (web)