Use your VPS as a backup server
Setup your own FTP server
LibreNMS, Cacti, Observium, Nagios
Setup your own proxy server. Squid
Require a desktop GUI?
Setup your own virtual private network
A web-based interface for system administration for Unix. Setup user accounts, DNS, file sharing and the program is freeware.
Hoopla Hosting uses OpenVZ for all its VPS services.OpenVZ is container based virtualization for...