The NetTech backup is a daily/weekly backup script that allows backing up a Windows server (using NTBackup), as well as Sharepoint and VMWare virtual machines. The plugin architecture allows making the script aware of additional backup types.
VCBmanager is intended to help system administrators using ESX Server or VMWare Server to manage their VCB Backups. It does not actually archive the taken snapshots but it helps in creating and managing failed and successful jobs.