Notepad3 is a fast Scintilla-based free text editor that permits simple programming tasks and more. A portable version is also available.
Notepad3 has many features and options like auto-completion for words, bookmark support, code folding, word occurrence marking, and case conversion. It can also perform powerful find and replace with regular expression support, line manipulation tools, an extended clipboard, and a zoom tool. There is also the option to set Notepad3 to be always on top, and it offers transparent window support making it a solid choice for replacing the default Windows Notepad.