Installed by default on every Unix/Linux system. After you learn how to use it, it's an incredibly powerful text editor. Handles huge files without any issues. A lot of useful plugins. Everyone calling them self a programmer or an sysadmin should know how to use it.

Vim is very good text editor. Vim also can be used in linux system. Vim can make your work become more faster. Because Vim use vintage that can be used to faster your job. You don't need to use arrow key and never leave your hand position. Very perfect text editor if you want to speed up your job.

First thing is Vim is free. Vim provide fast typing and keybinding for my work. In unix filesystem, is default installed vi mode which can be used at terminal / console. So you just need to learn one keybinding. Also vim has portable configuration that can you easily edit.