EnvyNG (Earlier Envy) is a driver installation script developed by Alberto Milone for Nvidia/Ati graphic cards. It is available only for Ubuntu and Debian systems.
Read it here
EnvyNG comes handy in installing drivers for Nvidia/Ati graphic cards, when the user does not want to manually do it or is unaware of manual installation. This tool is very useful for newbies, who find it arduous installing graphic drivers in Linux.