What are some alternatives?
When comparing memit and Raindrop.io, 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.
Pocket - When you find something you want to view later, put it in Pocket.
Imvges - Collect Images with One Click, Get Traffic to Your Site, No Content Filtering!
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
Dragdis - Drag & drop anything anywhere.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community