Second-generation open-tagging system for sharing multimedia, links, files, and blogs in a way that allows users to annotate them as belonging to shareable categories:

“TagWorld is helping build the Social Web by providing a unified set of easy-to-use, web-based services that will let users create and engage in a more meaningful, social experience.
        The Social Web empowers people’s ability to engage in self-expression and communicate and share information with whomever they choose. As the Internet’s influence evolves, a new social phase is emerging that calls for enabling people to place and have access to a broad range of personal information that they wish to place on the web. To support users, TagWorld sees five fundamental components for building out this new social web infrastructure: people, photos, blogs, tags and storage.” (from About on TagWorld site)

Starter Links: TagWorld home page | PC Magazine review