Adds a new type of feed you can subscribe to. http://example.com/feed/json or http://example.com/?feed=json to anywhere you get a JSON form.
JSONPress - Allows you to request WordPress site via JSON/JSONP output.
Fast and robust method of fetching your latest tweets
A fast and customisable plugin to display your latest Vimeo activity on your WordPress blog.
Fast, flash free, non-cached view of your Recent Tweets on Twitter
Fast, flash free, non-cached view of your Recent Tracks on Last.fm
Streampad gives you everything you need to play back the music you post.