Commerce Bug is a development and debugging extension for the Magento platform. It’s the must have extension for any developer, designer, or IT professional programming and configuring the Magento Ecommerce system.
The only Magento Layout Book you'll ever need. This DRM free PDF covers the Magento Layout XML system, CMS Pages, and Magento Widgets. Written by Alan Storm, it's the definitive guide for interactive developers and designers looking for tame Magento's frontend coding systems.