Critero Autoroll Widget
"Display links to blogs your readers will like".

Good widgets

Google Gadgets

Lab Pixies

Show Yourself
"ShowYourself is a simple to make, easy, free and fun utility to help establish your identity across the web. Have a Flickr account and a Facebook and AIM? Combine all your profiles on the web into one attractive widget that you can put on your blog, your myspace or anywhere on the web".

Spring widgets

Widgetbox

Widgipedia

Yahoo! widgets