StumbleUpon is the easiest way to discover new and interesting photos, videos, web pages and more, recommended by a community of experts. Tell us what you are interested in and we recommend page after page of amazing stuff you’d never expect to see.
Add useful extra features to Gmail, like hierarchical labels, an unread message icon on your browser tab, file attachment icons, and more.
Enhance Flickr with a compilation of useful Greasemonkey scripts.
Collections are groups of related add-ons that anyone can create and share.Explore Collections