• Akismet - I'm not sure if this counts, as everyone has it.
• Subscribe to Comments - A great way to let people keep up on the conversation after commenting.
• Easy Contact - Clean and simple email form without all the overhead of some of the more complex ones.
• WP Super Cache - Caching for dynamic WP pages to better handle high traffic without bringing down your server.
• Shopp - Great ecommerce plugin for selling physical or digital products on a WP site.

• Akismet to help manage spam
• Enhanced WP Contact Form
• Sociable
• WordPress Stats
• Breadcrumbs

I'm jumping on the Akismet bandwagon!

WordPress Automatic Upgrade

Wordpress Database Backup

CommentLuv

Yet Another Related Posts Plugin

• All In One SEO Pack - easily puts keywords in page titles, etc.
• Referrer Detector - works not only for social networking sites and search engines, but whatever else gives you a lot of press (Consumerist, NY Times, MSN, etc.)
• Subscribe To Comments - for reader stickiness
• Wordpress Database Backup - because you can never have too many backups
• Dagon Design Secure Form Mailer - I was able to customize this to create my own blog carnival submission form

1. MyReviewPlugin - If you are planning to earn affiliate commissions, building review sites separately or building review pages as part of your main blog is really something you may want to try.

The plugin I use to create review sites is MyReviewPlugin, you can more info by clicking here: MyReviewPlugin

1. GoCodes to build affiliate links
2. AddThis to add the social media sharing icons
3. Printthis to print any blog post
4. Most Popular posts