New plugins
Make Filename Lowercase sets uploaded media filenames to lowercase as a filter on sanitize_file_name.
Hotfix provides fixes for selected WordPress bugs, so you don’t have to wait for the next WordPress core release.
WP YOURLS Tweet sends status updates to Twitter when selected post types are published, and uses a custom YOURLS private URL shortener to generate a short URL for your post/page.
Updated plugins
Facebook Like for Tags allows you to automatically share to Facebook when posting new articles with specific tags or categories.
WP-QuickLaTeX allows you to insert formulas and graphics in the posts and comments using native LaTeX shorthands directly in the text.
For WP + yourls + twitter I’d highly recommend this plugin by Ozh one of the people behind yourls – http://wordpress.org/extend/pl.....o-twitter/