DocPad

DocPad is a superior alternative to Notepad.

DocPad  Review

DocPad is a superior alternative to Notepad. Although it fills the same role, plain text editing, it has many advantages: 10-level undo, alphabetization, block indent/unindent, bookmark, case conversion, encoding conversion, file history, jump to line, jump to offset, keyboard macros, print preview, search and replace, spell checking, statistics, variable pitch font, and much more. It also includes a built-in calculator, calendar, and character map.