DocPad is a feature-rich alternative to Notepad. In addition to the standard features, it offers many advantages including a 10-level undo system, alphabetization, block indent/unindent, bookmark, case conversion, encoding conversion, file history, jump to line, jump to offset, keyboard macros, search and replace, spell checker, statistics, variable pitch font, and more. DocPad also includes a built-in calculator, calendar, and character map.