Open Source Backup/Clone

BURP - BackUp and Restore Program
Clonezilla - is a partition and disk imaging/cloning program similar to True Image® or Norton Ghost®
Redo Backup & Recovery - is so simple that anyone can use it. It is the easiest, most complete disaster recovery solution available. It allows bare-metal restore.
rsnapshot - a remote filesystem snapshot utility, based on rsync

Symantec (Veritas) NetBackup

NetBackup Enterprise Server Support -
NetBackup: Backup, Recovery, Archiving - NetBackup 7 Platform
Official NetBackup page on Twitter - Twitter messages about Netbackup
SORT Tools for NetBackup - Symantec Operations Readiness Tools (SORT) is a set of Web-based tools that supports Symantec enterprise products.
Symantec Connect - Symantec Community
Symantec NetBackup 7.1 Late Breaking News -

Symantec NetBackup KB articles of interest

DOCUMENTATION: The command line equivalents for running the NetBackup reports available in the NetBackup user interface -
NetBackup Status Code Chart - a table for NetBackup's Status Codes, with links to potential resolutions for each.
Symantec NetBackup for VMware 7.1 Administrator's Guide - This guide describes how to use NetBackup for VMware to backup and restore VMware virtual machines that run on VMware ESX servers.