Jane is Just Another Nasty Editor, designed to view and edit all kind of ASCII files. There are millions of similar editors already available, but the choice is yours: those who try this might discover nice features they'll soon don't want to miss anymore.
When you need to create text documents, TextEdit is a highly versatile word processor, including tools to format and layout your page, edit and stylize text, check spelling, create tables and lists, import graphics, work with HTML, and even add music and movie files.
Acme is a powerful text editor, development environment and textual-user-interface platform developed by Rob Pike originally for Plan 9 from Bell Labs research operating system, and now has ports available for all major platforms.
TweakStyle is an Integrated Development Environment for Web Development. Unlike most IDEs, TweakStyle is tailor-made for Front-end Development and understands Web Design. It tends to packs all you need to code, preview and debug web pages with the perfect blend of features.
BabelPad is a free Unicode text editor for Windows that supports the proper rendering of most complex scripts, and allows you to assign different fonts to different scripts in order to facilitate multi-script text editing.