Plugins:

Comments (and spam)

• Akismet
• Subscribe to comments
• Comment Quicktags

Missing features

• Search Pages
• Mime Config
• Contact Form
• Get Custom Field Values
• WP-SNAP! (WordPress System for Navigating Alphabetized Posts)

Email

• Notification of new content
  • Maillist
  • Email Notification
  • Subscribe2
  • Mailman integration
• SMTP instead of sendmail
  • WP PHPmailer
  • WordPress SMTP Plugin

Authentication & Restriction

• Registered Only
• Auth Only

Stats

• Shortstat
• Slimstat
• Mint
• Refer
• Google Analytics (5)
• Performancing Metrics
• AWStats

Photo Gallery Integration

• Flickr (9)
• ZenPhoto
• Coppermine
• Gallery (5)
• Qdig
• phpwebgallery
• PhotoPress

Calendars

• WP-iCal
• EventCalendar 3.0

Other

• Paypal Integration

Hacks:

• Custom Database Error Message