Some Wordpress plugins are often updated, which is good think. Plugins that are updated are 100% compatible with last Wordpress version and they also are the most secure possible. A plugin that has not been updated for a long time might not work with last Wordpress version and might create a security breach for you website.
Plugin for WordPress to insert the code snippet for IE6Update into your WordPress pages.
Adds a social bookmarking menu to your posts/pages/index. Based on Josh Jones' SexyBookmarks plugin: http://eight7teen.com/sexy-bookmarks
Make TinyURL-like URLs (you.com/33ks8s) that redirect to pages inside / outside your blog. Can also create human-readable aliases (you.com/facebook).
Improves your blog's search engine optimization by "noindexing" pages you choose.
This plugin parses and displays upcoming events from a Google Calendar XML feed.
Since WordPress does offer attaching downloads to pages, but doesn't keep track of the amount of downloads, this plugin was written.