jQuery edit in place plugin. Extendable via plugin architecture. Plugins for plugin. Really.
Chained selects jQuery plugin. Works both with and without AJAJ.
Additional selectors for jQuery which enable you to choose element in or out of viewport.
jQuery plugin which enables lazy loading of images.
In early 2011 Facebook started to send all application requests as POST. This Rack middleware converts POST requests back to GET when applicable.
Captures Rack output and caches it as static file to public directory. All subsequent requests are then served by Passenger and they never reach Rack.
Mephisto style asset management for Frog CMS
Caching plugin for Frog CMS. It can make your site withstand Digg effect and Slashdotting at the same time.
Mailer backend plugin for Frog CMS. It provides email templating and sending.