1. The smartest JavaScript IDE

  2. Text editor + file transfer + svn + CSS + Terminal + Books + More = Whoah. Welcome to Coda. Grow beautiful code.

  3. Cross-platform IDE for productive Ruby & Rails development.

  4. GNU Emacs is an extensible, customizable text editor—and more.

  5. TextMate brings Apple's approach to operating systems into the world of text editors.

  6. Eclipse IDE for Java EE developers.

  7. Lightweight IDE for Linux and Windows

  8. Komodo Edit is a fast, smart, free and open-source code editor.

  9. BBEdit is a professional HTML and text editor for Macintosh that provides features for editing, searching, and minipulation of text for web authors and software developers.

  10. RStudio™ is a new integrated development environment (IDE) for R.

  11. The world’s most powerful open-source web development IDE just got better. Rebuilt from the ground-up. It's now much faster, customizable and includes new features to help you be more productive.

    open-source

  12. Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.