Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
Tabbles - Tabbles use tags to organize and find files along with your colleagues.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
allTags - allTags is a free, tag based file management application.