Best Free Backup Program
Back In Time , a convenient tool to backup your specified files and folders, with profiles to set up where to save snapshots at a time interval you choose, sources to include files and folders, recommended patterns to exclude, auto-remove and other options.
This application minimizes usage of your disk space by taking a snapshot only if the files have been changed, and hard links for unmodified files. Both GNOME and KDE front-ends are available. (Review)
luckyBackup , a useful tool to safely back up your data that you've changed in a source directory to a destination directory, or create multiple backup snapshots to a specific date and time. You can also use it to sync any directories to keep files identical on various devices.
Other features include options to exclude certain files, setting up profiles, scheduling and simulation controls. (Review)
Areca Backup supports the typical full, mirror, incremental, and differential backup methods with several additional “storage modes” including a delta block mode. For compressed archives, it uses both Zip and Zip 64 with the choice of just about any encoding algorithm your heart desires. It allows you to place each backup in a single Zip archive, or a separate Zip for each file. Zip archives can be automatically split at any size you choose. (Review)
Best Free CD Recovery Utility
Best Free Disk Image Editor
ISO Master is a handy tool for editing ISO image files. It has a two-pane view to facilitate moving files and directories between the hard disk and the ISO image, and supports for handing a boot record and creating a bootable disk image.
Best Free Drive Imaging Program
G4U ("Ghosting for Unix") , "Not only can it clone disk to disk (any size) and copy disk partitions, it can also create and restore image files both locally and from an FTP site, if the workstation is connected to a wired network with a DCHP service." (Review)
Best Free Duplicate File Detector
FSlint , a convenient tool with both GUI and command lines modes to detect duplicate files and reclaim disk space. It also helps to identify unwanted or problematic file names, temporary files, bad symlinks, empty directories, nonstripped binaries and redundant whitespaces.
Best Free File Archiver / Zip Utilities
File Roller is an archive manager designed for the GNOME desktop environment to create archives, view or extract files from archives, work as a front-end to the command-line archiver supporting various popular file formats.
Ark , a free and open source program designed for the KDE desktop environment to view, extract, create and modify archives in various formats such as tar, gzip, bzip2, zip, rar and lha.
Best Free File Comparison Utility
KDiff3 , a convenient tool for you to compare two or three input files and show the differences line by line and character by character. It also provides an automatic merge facility and an integrated editor for comfortable solving of merge conflicts. (Review)
Best Free File Copy Utility
UltraCopier has some pretty exciting features including an excellent file resume option, which allows for resuming of a file transfer from a disconnected USB key. If you're in the middle of a file transfer from a USB key and it somehow becomes disconnected, when you plug it in again all you have to do is to hit resume and it will pick up where you left off!
It has also other useful options such as speed limitation and searching through the copy list. And as far as looks go, UltraCopier is a much more visually attractive copier replacement. (Review)
Best Free File Encryption Utility
AES Crypt is a simple program that adds a context menu item in the file system context menu. There is no program window as you have for most programs.
You simply right-click the file you want to encrypt or decrypt in the file listing, select the AES Crypt item, and enter your password in a little dialog box. A new encrypted or decrypted version of the file is created. Since the original file is not purged, you would need to shred it with a secure erase utility." (Review)
GNU Privacy Assistant (GPA) , a useful tool with the graphical user interface for the GNU Privacy Guard (GnuPG or GPG) to encrypt, decrypt, sign files, verify signatures and manage the private and public keys.
Best Free File Manager
Dolphin , a file manager for KDE (by default) and good for other desktop environments such as GNOME as well, focusing on usability with navigation bar, view properties, split of views, dockable panels and many other useful features.
Best Free File Transfer
Dukto , a convenient tool to transfer files, folders or text from one device to another auto detected device on a local area network at high speed across mutiple platforms including Linux, Windows, OS X, Android, iOS and BlackBerry. (App of the Week)
Best Free Folder and File Synchronization Tool
FreeFileSync , a solid application with very clear and informative interface. The preview is very easy to understand, file collisions and deletions are readily recognizable.
If you require a sync program that can copy files that are in use or locked, it has you covered there too! (Review)
Grsync , a graphical user interface for rsync and an effective tool to synchronize folders, files and make backups with support for sessions, simulation, execution, checksum, logging as well as other basic and advanced options for you to choose.
Unison , set up a profile to sync folders and files locally on the same machine or remotely across a network with this capable tool, which runs on both Windows and Unix systems, like Linux and OS X, and works across platforms.
Useful features include detecting and displaying conflicting updates, optimising transfers of small updates to large files using a compression protocol similar to rsync.
Best Free Online Backup Sites
Dropbox provides 2 GB free space for backing up and sharing your files, works similar to any other folder of your computer—after installation, simply drag and drop files/folders to Dropbox you want to backup, share or sync with other computer. (Review)
Best Free Partition Manager
GParted , a GNOME partition editor for resizing (enlarging or shrinking), creating or deleting, moving or copying partitions on a hard disk, creating a partition table, enabling or disabling partition flags such as boot and hidden. (Review)