Attachment File Icons displays file type icons adjacent to files uploaded to pages/posts.
All in One Webmaster has options to add Google, Bing, Alexa, Blog Catalog, Yahoo’s Webmaster and Analytics code (meta tags).
Facebook Members enables Facebook Page owners to attract and gain Likes from their own website.
Polaroid Gallery is used to overlay images as polaroid pictures on the current page or post and uses your WordPress Media Library.
Twitter Goodies shows your twitter profile/search tweets under your Sidebar Area (Widget), Post and/or Pages.
WP Missed Schedule allows you to fix missed schedule posts.
WP Overview (lite) shows an overview and memory usage on the WordPress Dashboard.
WP Super Cache is a static caching plugin for WordPress. It generates html files that are served directly by Apache without processing comparatively heavy PHP scripts.