rsync

Duplicati is the only portable backup program, able to send backups in encrypted form to another computer or MS Live SkyDrive using one of several methods (WebDAV, FTP, SFTP/SCP/SSH, Amazon …

iGoUSB Backup is a portable plug'n use software solution that provides a simple, efficient and uncluttered way to save a copy of your computer files, documents, pictures, music and video …

Déjà Dup is a simple backup tool. It hides the complexity of doing backups the 'right way' (encrypted, off-site, and regularly) and uses Duplicity as the backend. It features support …

Areca 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 …

Super Flexible File Synchronizer is now SYNCOVERY. Back up your data and synchronize PCs, Macs, servers, notebooks, and online storage space. You can set up as many different jobs as …

Toucan is a small portableapp utility allowing you to synchronise, backup and secure your data with more options than the built in suite utilities. It is split up into 7 …

[Discontinued: http://web.archive.org/web/20130129104355/http://www.gfi.com/pages/backup-freeware.asp] GFI Backup will allow all home PC users to keep regular and updated copies of their precious memories...

ViceVersa does File Synchronization, File Replication, File Backup and File Comparison. It can automatically verify data using a CRC32 checksum. ViceVersa lets you synchronize files, replicate folders,...