Rescatux is a GNU/Linux rescue CD that comes with Rescapp, a nice wizard that will guide you through your rescue tasks. It can restore Grub to the MBR update a Grub configuration, perform filesystem checks, fix a Windows MBR, and more. Features that can indirectly assist the rescue process include chat programs to let you reach human online help, a share log (automatic pastebin), and a share log that uses formatting appropriate for posting on a forum.
giis-ext4 (gET iT i sAY) is a file recovery tool for Ext4 filesystems. Once installed, current files and newly created files can be recovered. It allows users to recover all deleted files, recover files owned by a specific user, and recover files of a specific type, such as text or PNG. It uses ext2fs lib and sqlite.
pgpry is a Pthreads-based password recovery program for private OpenPGP keys. It reads private key data from stdin and performs a brute-force attack in order to recover the pass phrase. Numerous options for restricting the key space are offered, including regular expression filtering and prefix/suffix filters.
PhotoRescue will undelete, unerase, and recover pictures, images, and files lost on corrupted, erased, or damaged compact flash, smartmedia, memory sticks, mmd, XD, multimedia, or secure digital memory cards when other solutions fail. It supports the recovery of all file types, but its algorithms are particularly optimized for JPEG files, TIFF files, GIFs, and BMPs. It also offers constantly updated support for CRW, NEF, ORF, MRW, and many types of movie files. In some cases, it can even rebuild pictures that have suffered minor corruptions. It deals with cases where the media is not visible as a drive letter anymore. The unique unfragmenting technology rebuilds cherished memories that would otherwise have been lost forever.