I was recently looking around for a set of Ajax widgets that could give me drop-in star ratings, tagging, and commenting features in an arbitrary webapp. I didn’t find all of them, and we ended up going with an off-the-shelf commercial solution, but here are some of the widget libraries I ran across.
- Dijit – The Dojo Toolkit
- Google Web Toolkit (GWT) – Widgets wiki page
- jQuery Plugins
- Yahoo! User Interface (YUI) – includes widgets