Advanced Browser Check gives you the option to give a visitor of your site a warning popup if they use a browser that you don’t support on your site.
Favorite Plugins Widget displays your favorite plugins from your WordPress.org profile along with star ratings and author info.
Thin Out Revisions helps you thin out post/page revisions manually.
Yet Another Related Posts Plugin displays a list of related entries on your site and feeds based on a unique algorithm.
Ultimate TinyMCE beefs up your visual editor with a plethora of advanced options.