Jacob Gube of Six Revisions discussed about five new breed of free source code editors that give paid applications a run for their money. The distinguishing characteristics of modern source code editors are minimalism, extensibility, integration with web browser, cross-platform compatibility and open source. Here is the list of the source code editors:
I think the built-in JS debugger in Brackets is rather cool. Check out his post to read more about the five free source code editors.