Freeware Shorts: DocPad
DocPad (Version:10.0 as of this post) is a text editor and an enhanced alternative to Notepad. Beside the typical plain text editing it offers the following and more.
Adding or removing indentations. Bookmarking specific lines. Jumping to a specific line. Removing extra spaces. Converting case. Converting between formats like Base-64, UTF-7 and others. Dragging and dropping files or chunks of text. Spell checking.
DocPad has built in calculator, calendar and character map tools as well.