What are some alternatives?
weheartit.com - We Heart It lets you create an online album (a heart) with your favorite images and videos.
Imvges - Collect Images with One Click, Get Traffic to Your Site, No Content Filtering!
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
vi.sualize.us - A social bookmarking website for visual contents — vi.sualize.
Dragdis - Drag & drop anything anywhere.
Pinterest - Pinterest is a visual discovery tool that you can use to find ideas for all your projects and interests.