Notice: Neat Bookmarks has been sold and I'm no longer the owner of the extension.
Try Neater Bookmarks instead.
A neat bookmarks tree popup extension for Google Chrome. Licensed under the MIT License.
Read the FAQ.
Neat Bookmarks was powered by MooTools, but is now powered by Neatools, a custom-coded smaller subset of MooTools. CodeMirror is used for the Custom CSS section.