Tinderbox stores and organizes your notes, plans, and ideas. It can help you analyze and understand them. And Tinderbox helps you share ideas through Web journals and web logs.
Zigtag is a revolutionary new semantic, social tagging service that allows you to save your favorite websites, see what your friends are tagging, and find the sites you're really looking for!
It’s been four and a half months since Yahoo first previewed Delicious 2.0. We’ve heard not a peep from them since as to when it might launch publicly and replace the existing, somewhat dated interface.
Twitter Groups allows you to tag your followers into different groups. Then you can send a message to those groups without needing to send the message to each person one at a time!