Notepad++ is a free text editor that supports color-coded syntax highlighting for different programming languages, auto-completion, the ability to open different tabs with different files at the same time, and support for plugins to extend functiona…
DocPad is a free alternative to Notepad. Although it fills the same role, plain text editing, it offers an arsenal of time-saving tools: block indent/unindent, bookmarking, case conversion, customizable toolbar, encoding conversion, file history, jump to line/offset, keyboard macros, print preview, search and replace, skinnable interface, spell checking, statistics, variable pitch font, and much more. It also includes a built-in calculator, calendar, and character map.