http://en.wikipedia.org/wiki/Comparison_of_Javascript-based_source_code_editors http://en.wikipedia.org/wiki/Comparison_of_Javascript-based_... EditArea has a

http://en.wikipedia.org/wiki/Comparison_of_Javascript-based_source_code_editors http://en.wikipedia.org/wiki/Comparison_of_Javascript-based_... EditArea has a lot of features and works well, if it displays properly in your browser: http://www.cdolivet.net/editarea/ http://www.cdolivet.net/editarea/ CodePress does pretty well in FireFox: http://codepress.org/ http://codepress.org/ I think CodeMirror has the most potential -- I like the parser design in particular: http://marijn.haverbeke.nl/codemirror/ http://marijn.haverbeke.nl/codemirror/