Tips and tricks from upgrading several sites from D6 to D7
create the structure of a site, complete with placeholder pages, custom paths and proper placement in the menu structure without the tedium of the Drupal GUI
Drupal 6: complex node synchronization with Pubsubhubbub
Cache actions provides rules actions for clearing drupal caches.
The Konami Code is a cheat code that appeared in many Konami video games. The Konami Code module makes it so that when users enter a given code on your website, it invokes a certain action.
This module implements a views cache plugin that is aware of content and can provide caching for views, until the content in those views changes.