Vim

Vim is a highly customizable text editor for Windows PCs. Designed to facilitate efficient text editing. It is an upgraded version of the vi editor, which comes with most UNIX systems. The program is sometimes referred to as a "programmer's editor," and it is so useful for programming that many consider it an entire integrated development environment. It's not only for programmers, though. Vim for PC is ideal for all types of text editing, from composing emails to editing configuration files. Despite what the above comic suggests, the tool may be made to work in a very simple (Notepad-like) manner, known as evim or Easy Vim. 

The tool is not a user-friendly editor. It is a tool, and its use must be learned. The application is not a word processor. Although it can display text with numerous highlighting and formatting options, it does not support WYSIWYG editing of typeset documents. (It is excellent for editing TeX, however.) Vim for Windows is a powerful text editor that aims to match the capabilities of the de-facto Unix editor 'Vi' but with a broader feature set. It is handy whether you are already using vi or using another editor.