Firefox Sync - Bring your Firefox bookmarks, tabs, or passwords wherever you go with Firefox Sync. Share between computers and mobile devices. Get Firefox now!
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
IsYourLinkSad? - Is Your Link Sad. Make It Happy. Share your URLs to people who actually care.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
The Bored Hoard - Sieve the web for cool websites you probably never knew existed. Supporting the smaller independent sites that Google ignores. All revealed in a weekly box delivered online every Friday.