CGSecurity
CGSecurity is the odd one out in this directory: not a company selling tiered products, but the site of French developer Christophe Grenier, who has maintained TestDisk and PhotoRec as free, open-source tools for a long time. There's no purchase to make and no upsell — the tradeoff is a command-line-first interface with a much steeper learning curve than anything else on this page.
TestDisk
FreeRepairs partition tables and boot sectors and can make a lost partition bootable again — the file-system-damage and partition-loss scenarios covered on this site, handled without a graphical interface.
See full details →PhotoRec
FreeA file-carving tool that reconstructs files by scanning raw data for recognizable file signatures rather than relying on the file system's index — useful when the file system itself is too damaged for a normal deletion-recovery tool to work, though it recovers files without their original names or folder structure.
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