Puzzler plugin - it smart simple and fast auto aggregator (combiner) CSS and JS scripts for WordPress.
Automatically adds Google +1 buttons to your posts and lets you customize it's display methods
Easy-to-use plugin to manage your OneScreen account within WordPress and to publish video applications on your WordPress Site
Provides an easy way to selectively add actionable social sharing buttons to your posts content or below the post in a 'Call To Action' box.
Using the "Single-Term Taxonomies" plugin you can limit the taxonomy terms chosen for a post to maximum one.
A simple one word language translator that uses machine translation.
Provides a +1 button from Google+ beneath each post/page.
It lets user adds Twitter, Facebook, ShareThis social media on pages. Build with various options like display order, automatic, manual mode.
The ShareMacro widget empowers your visitors to email, bookmark and share your site with services, such as Facebook, Twitter, StumbleUpon, Digg..
Widget that displays a Google recommend (+1) button.