[jfhscribbles]

Here's a few I use and like:

1. Google (XML) Sitemaps Generator - generates a XML-Sitemap compliant sitemap of your WordPress blog.
2. Homepage Excerpts - makes blogs that use full posts on the homepage more search engine friendly and gives flexibility to people that want to use both full posts and excerpts on the homepage.
3. CommentLuv - leaves a link to a commentors last post under their comment.
4. Contact Form 7 - simple and flexible contact form.
5. Maintenance Mode - adds a splash page to your blog that lets visitors know your blog is down for maintenance. Logged in administrators get full access to the blog including the front-end.
6. RSS Signature - provide a simple administration interface to allow the addition of a custom tagline, signature or © copyright message to the wordpress generated rss feeds. You can add any kind of message, tag, or even images — as long as it can be displayed in an RSS feed, it’s up to you.
7. Sociable - adds social media buttons to your posts.
8. WP-DBManager - manages your Wordpress database. Allows you to optimize database, repair database, backup database, restore database, delete backup database , drop/empty tables and run selected queries. Supports automatic scheduling of backing up and optimizing of database.
9. Subscribe to Comments - allows commenters on your blog to check a box before commenting and get e-mail notification of further comments.