Like Firefox smart bookmarks but online!

Ask and Answer Questions. Oyogi has search facilities that enable users to query its knowledge base, but it is not a search engine in the traditional web sense of the term.

Ask and Answer Questions

coComment is a social software for following comments, like bookmarking comments

Technorati is a real-time search engine that keeps track of what is going on in the blogosphere — the world of weblogs.

gada.be is a metasearch service fueled by dynamic (keyword-driven) search results in RSS or Atom formats

Wink is a tagoshphere search engine with bookmarking and tags

Gravee is different in two very important ways: our business model and our algorithm. And, those differences are focused squarely on how we can better serve our community of users.

Bookmark related search, Poeple powered search, tag search…

Social bookmark service that usese hierachical tags(clusters)

Social bookmark community where each bookmark has it’s own page. Features: tags, groups, discuss

open source clone of del.icio.us

Social bookmark community that uses Ajax. Features: tags, rating, follow other users, shoutbox.

Social bookmark service that uses thumbshots and tags

Social bookmark service that uses categories, rating and save a copy. owned by looksmart

Social bookmark community that uses tags.