Rsnapshot!

Duplicati is the only portable backup program, able to send backups in encrypted form to another computer or SkyDrive using one of several methods (WebDAV, FTP, SFTP/SCP/SSH, Amazon S3, Rackspace CloudFiles, USB disk, Windows network share). Time scheduler e.g. for auto-backups every 3rd Monday on 10 a.m.German, Danish, English, French, Portugese. Can also be startet from command-line. Support for snapshots via VSS and LVM: Backup of open files. Duplicati is a rewrite of Duplicity/ftplicity, written for Windows (in managed C# .NET). It also runs on Linux using the Mono framework.The lastest portable version in all 5 languages can be downloaded as a zip file from https://github.com/duplicati/duplicati/releases »

Comodo Time Machine (CTM) allows non-commercial users to quickly restore their entire system to an earlier point in time (including the registry, critical operating system files and user created documents).This free tool is especially useful to roll back your system to the last known working state in the event of virus attacks or crashes.

Back In Time is a simple backup tool for Linux inspired from FlyBack and "TimeVault". The backup is done by taking snapshots of a specified set of directories.

Areca Backup is a file backup software which can be run on Windows or Linux. It creates backup copies (which can be encrypted and compressed) of your files and stores them on external drives, USB keys, FTP servers, supporting incremental, differential and full backups. It also allows you to browse your backups and navigate among different version of the files contained in your archives.

Simple system backup and restore application with extra features.Systemback makes it easy to create backups of system and users configuration files. In case of problems you can easily restore the previous state of the system. There are extra features like system copying, system installation and Live system creation.

Toolwiz Time Machine (Toolwiz multi-point restoration) is a powerful and easy-to-use undelete freeware, protecting your PC from data loss and improving its security. It allows users to create no more than 24 snapshots of your system partition on a regular basis to backup your system. If your current system gets damaged or crushed or you are not just satisfied with it, you can use Toolwiz Time Machine to rollback your system to any snapshot you want. Key Features Instant Backup

Duplicacy is a new generation cloud-backup tool supporting 5 major cloud-storage providers (Amazon S3, Google Cloud Storage, Microsoft Azure, Dropbox, and Backblaze), as well as local disks and SFTP servers (such as Mac/Linux computers or NAS boxes). Duplicacy is the only cloud-backup tool that offers all the following 7 essential features:

File History when enabled protects files from within the libraries, desktop, favorites, and contacts folders and creates copies of the files. in any event of a system refresh, reset or crash the files that were backed up through File History can easily be restored. File History's restore interface has been made easy and simple to find and restore any version of files that were lost or damaged. File History is turned off by default and needs to be turned on manually and configured how it will save copies of files. Also, before using File History you will need an external storage device or network location with enough storage space to save copies or versions of files for all users. »

Back4Sure is a feature-rich backup solution for typical backup use. No VSS Volume Shadow Copy function for open files. The program can make a backup to hard-disk, USB drive or network and can also be compressed using high or low compression settings to a ZIP or 7-zip file of various compression levels, as well as encrypted for security.

Bareos is a 100% open source fork of the backup project Bacula . The fork is in development since late 2010, it has a lot of new features.

Cronopete is a Linux clone of Time Machine , the backup utility for Mac from Apple. It aims to mimic it as closely as possible.

Lsyncd watches a local directory trees event monitor interface (inotify or fsevents). It aggregates and combines events for a few seconds and then spawns one (or more) process(es) to synchronize the changes. By default this is rsync. Lsyncd is thus a light-weight live mirror solution that is comparatively easy to install not requiring new filesystems or blockdevices and does not hamper local filesystem performance.

KLS Backup - Powerful backup and synchronization program with FTP, WebDAV and cloud support (Windows Azure, Amazon S3, Eucalyptus Walrus)