Backup4all!

FreeFileSync is a free Open Source software to synchronize files and synchronize folders available for Windows, Linux and Mac OS X. It is designed to be easy to use while having nice visual feedback along the way.

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 »

GoodSync is the high-end professional easy and reliable file backup and file synchronization software.

Simple fast backup for Windows. At a glance - small and very lean, very fast delta copier, excellent user interface, device tracking, shadow copying, move/rename detection, run-as-a-service mode, robust support for multi-million item backups with terabytes of data, intelligent and discrete update mechanism. Ideal for backups going to external USB drives and NAS devices.

Get 5 GB of full featured Online Backup for free. Features include Automatic Backup, True Archiving, Versioning, Continuous Backup, Mapped Drive Backup and Web-based Backup Management.IDriveSync syncs files online across multiple PCs and Macs. On installing and logging into the application, it opens up a 'Sync' area where you can add the files you wish to sync.With iDrive Sync you can Sync up to 5 computers: Once you have new data into your Sync area, your Sync data starts getting transferred online, or 'Syncs-Up'. This essentially serves as an online backup of your data. Now, if you simply install and login on multiple PCs / Macs using same authentication, the synced data is 'Synced-Down' onto those multiple computers.Anytime you make a change to synced data anywhere on those multiple computers, all the computers will shortly reflect the modified data. »

Create Synchronicity is a nice, lightweight backup program with a very user-friendly - yet powerful - interface, that synchronizes files and folders extremely quickly (it can even recognize paths such as "MyUSB"\MyFolder, and locate the USB drive called "MyUSB").Its open source, fully portable, and multilingual ; and it can schedule backups and has many advanced options like DST correction and regexp settings.

Allway Sync is a file and folder synchronization software for Windows.

Mozy is an online backup service that offers a set-it-and-forget-it solution for backing up all of the important files on your computer. With MozyPro, there is no extra hardware to buy, no setup fees, and with our automatic backups, no additional management required to oversee it all.

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.

Back up your data and synchronize PCs, Macs, servers, notebooks, and online storage space.

Copywhiz enhances your file copy experience in Windows. It offers more flexibility when copying and backing up files by letting you choose which type of files to copy & which to ignore.

Jungle Disk is a leading provider of online storage software and services, leveraging the Amazon S3 platform and Rackspac infrastructure to provide easy to use and cost effective online storage and backup to our customers. The multi-platform Jungle Disk software allows users to access an unlimited online storage space via a virtual drive and also includes comprehensive automatic backup features.

Gladinet Cloud Desktop mounts cloud storage to your local desktop PC. It is a simple desktop application.