Notepad++ is a free source code editor and Notepad replacement that supports several languages.
Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features.
Bluefish is a powerful editor targeted towards programmers and webdesigners, with many options to write websites, scripts and programming code. Bluefish supports many programming and markup languages, and it focuses on editing dynamic and interactive websites.
Notepad3 is a fast and light-weight Scintilla-based text editor with syntax highlighting. It has a small memory footprint, but is powerful enough to handle most programming jobs.
Syntax Highlighting: Colorize more than 50 pre-installed major languages like HTML, PHP, Python, Ruby or Markdown. You can also create your own settings.
TextWrangler is the powerful general purpose text editor, and Unix and server administrator’s tool.Discontinued
The developers announced that development of TextWrangler has stopped, in favor of concentrating their efforts on the development of BBEdit.Quoted from the TextWrangler webpage, "We are sunsetting TextWrangler, and we encourage anyone interested in TextWrangler to download and use BBEdit instead."
ATPad is a simple Notepad replacement written in pure C and Windows API. Keeping simplicity of Notepad it provides many additional features. 90kb UPX repacked.
Howl is a general purpose editor that aims to be both lightweight and fully customizable. It is built on top of the very fast LuaJIT runtime, and can be extended in either Lua or Moonscript. It has a minimalistic UI driven mainly by the keyboard.
The last version (0.6) is from April 2019.
Lines is a modern and minimalist text editor - IDE with support for over 150 programming languages, embedded code inspectors and many other cool tools to help you write better code.
People joke about what IDE they use often, things like Word, MS Notepad, sometimes even Eclipse, and then often times MS Paint. People joke about MS Paint because it's not even a text editor, people joke about it because it doesn't have one feature in common with IDEs.