From the category archives:

Code

Validate your json strings with json validator

by ManuMiwim on March 22, 2010

The Mootools forge is open

by ManuMiwim on December 14, 2009

XHTML W3C validation of an entire website

by damdec on December 9, 2009

CSS Beautifier : online CSS optimization tools

by damdec on December 7, 2009