The Plugin Debug Objects provides a large number of information: query, cache, cron, constants, hooks, functions and many more.
Like Gate allows you to reveal some hidden/secret content when the user likes the article. Therefore increasing the likeness of your articles.
Work with FirePHP, only PHP5 and a sample af values of WordPress
List query-actions only for admins; for debug purposes
Adminer is a full-featured MySQL management tool written in PHP. This plugin include this tool in WordPress.
This plugin adds a Like-Button wherever you want on your blog. Before or after the content as well as a sidebar-widget. And many more!
Stalker Tracker is a tool designed for unpopular bloggers to track stalkers on their blogs,
typically their ex-boyfriends/girlfriends.
RSS link for this tag.