Project page @ http://tsi.github.io/acelet/
Acelet is a bookmarklet that allows you to edit selected text and code snippets in an advanced code editor, right in your browser.
- Highlight some code on any page and pass it to the code editor.
 - Edit your snippet right in the browser, with Ace.
 - Syntax selection (60 different flavors).
 - Theme selection.
 - Save to file.
 - Set your own defaults on the project page.
 
ATM this is Chrome/ium only.
BSD licenced.