What are some alternatives?
When comparing memit and vi.sualize.us, you can also consider the following products
weheartit.com - We Heart It lets you create an online album (a heart) with your favorite images and videos.
Reddit - Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Digg - Digg delivers the most interesting and talked-about stories on the Web right now.
Imvges - Collect Images with One Click, Get Traffic to Your Site, No Content Filtering!
Dragdis - Drag & drop anything anywhere.