Haven't visited the plugin page on the wiki in a while and found a few plugins I'd like to play with at some point:
PictPress
(as stated on the wiki) : automatically add thumbnails and pictures for all images in a directory when publishing a post.
SnailGallery
create a static gallery of images inside a post.
Comment Moderation auto-switch on older posts
Automatically turns on comment moderation for older posts (good spam prevention – while not turning comments OFF for those posts.)
TalkBalk
This plugin by Shelley allows you to insert links to display all comments by a person(name or url) on your weblog.
Amazon Wishlist
Give it an Amazon wishlist ID, and it will display a random item from your wishlist
ImageManager Plugin
As stated on the wiki: The Image Manager plugin integrates the stand alone PHP ImageManager + Editor with Word Press. (read about the PHP ImageManager here. I'm assuming that it brings that functionality into WordPress?)
Edit Button Template
A template that allows you to add buttons to the quick tag buttons using DOM. (so you don't have to edit core files!)
Hide or Cut Post Text plugin
Make parts of your post only appear on the "permalink page" permanently hide other content.