Social+Bookmarking

Diigo Social bookmarking, research, collaborations, annotation, ability to capture websites, form a community, create a groups and network to get new links.

[|Pinterest] Pinterest is an online pinboard where you can share your interests with others.

Sqworl Visual bookmarking

Linkable Organize and access all your personal links on a single page.

[|Twitter] Social networking site that lets you share your ideas and quips with the world.