CommentLuv

Comments are a wonderful thing to receive on your blog, with CommentLuv for WordPress and WordPress MU you can give something back to your community straight away by including a titled link for their last blog post or tweet on the end of their comment.

The plugin fetches the feed found at commenters site URL while they type their comment and extracts the last blog post title with link and displays it below the comment form. When they submit their comment, the last blog post link gets added on the end of their comment for all to see!

As a member of The ComLuv Network, you can register your site url and receive 10x the luv when you comment on enabled blogs and if you start a blog here, you can even add your twitter and digg accounts to your returned posts (or add more blogs, up to 5)

Login LockDown

Login LockDown records the IP address and timestamp of every failed login attempt. If more than a certain number of attempts are detected within a short period of time from the same IP range, then the login function is disabled for all requests from that range. This helps to prevent brute force password discovery.

Hikari Enhanced Comments

Hikari Enhanced Comments enhances comments with features that make comments more visible and and becoming more exciting in website structure.

Things that you’ve been wanted to do, now can be done much easier.

Google Analytics for WordPress

Very complete Google Analytics plugin with easy authentication and lots of other features. Developer Joost de Valk provides tutorials and releases very frequent updates expanding the plugin.

Track your WordPress site easily and with lots of metadata: views per author & category, automatic tracking of outbound clicks and pageviews.

WP-Table Reloaded

Tobias Bäthge has created an incredibly useful plugin. I make use of this plugin daily on several sites and it allows me to streamline my work and save time. Very full-featured and constantly updated.

Thanks Tobias, I hope you get some love here!

Log Deprecated Notices

This awesome plugin by Andrew Nacin, logs the usage of deprecated files, functions, and function arguments, offers the alternative if available, and identifies where the deprecated functionality is being used.

WP_DEBUG not required (but its general use is strongly recommended).

Event Registration

This plugin is designed to allow you to take online registrations for events and classes. 

Secure Admin

Adds security to the most important area of your WordPress site. This plugin secures the login and admin pages using Private or Shared SSL.

Changelogger

For many many people a changelog is a very important thing; it is all about justifying to your users why they should upgrade to the latest version of a plugin. Changelogger shows the latest changelog right on the plugin listing page, whenever there’s a plugin ready to be updated.

GD Press Tools

GD Press Tools is a collection of various administration, SEO, database, backup, cron job scheduling, maintenance, expanding WordPress panels and security related tools that can help with everyday blog tasks.

Plugin integrates into various WordPress administration panels to add new useful columns that WordPress doesn’t have by default, can be used to perform maintenance operations, change some aspects of WordPress, show detailed server settings and information. Plugin offers several unique tools that can be very useful. All options are divided into several panels. Some of the features are integrated into the post/page edit panel in form of widget, and also add dashboard widgets for quick access to some of the plugins features.