Arkeia
Backup software and network backup solutions for linux, unix, windows ... on san, nas, lan and wan enviroments. arkeia provides powerful data protection backup software for networked storage devices.
http://www.arkeia.com/
Amanda
Amanda
http://www.amanda.org/
Bacula
Bacula a network backup and restore program
http://www.bacula.org/
BRU
Bru, backup & recovery utility, software solutions for mac os x, unix, linux, solaris, irix, and windows systems for small businesses to enterprise level solutions.
http://www.tolisgroup.com/
Filesystem Backup
The world's largest development and download repository of open source code and applications
http://sourceforge.net/projects/fsbackup/
Linuc-Backup.net
Linuc-Backup.net
http://www.linux-backup.net/