Provides a visual testing page for Drupal themes. Quickly compare the display of common elements across your themes, and verify that your new theme addresses all common style elements.
Pathologic is an input filter for Drupal which attempts to make sure that links to other content in your Drupal installation, as well as images and other media, will always work correctly; the links won't "break" in situations which would otherwise cause them not to work.
Genesis is an standards compliant, accessible and semantically rich starter theme for Drupal 6. Genesis is easy to theme yet extremely flexible, giving you endless theming possibilities. Genesis makes building a standards compliant accessible theme easier than starting from scratch.
This module allows you to protect your website with a browser-based password (HTTP Auth). The usernames and passwords are tied directly to the Drupal user database. You can restrict access to the site by role and choose to secure certain pages or the entire site. This means the site will be inaccessible to search engines and other crawlers, but you can still allow access to certain people.
Case Study: Automated module conversion from 5.x to 6.x using Deadwood
Start with "Switch on tracing", this module trace every queries performed behind the scene, store them and push the stored queries to another server on request.