It allows users to create text, photo and audio notes that auto-synchronize across different platforms. Users can also easily access and share files of different formats, read The Utimate Guide to The Use of Evernote in Education to learn more.
This is another awesome service that every teacher should be using. It allows you to organize your resources and links into tabs and folders. Check out this awesome Livebinder to see how it looks like when you organize your links.
There are two uses for Diigo, the first as a bookmarking tool where you can bookmark and organize the links you come across online and you can also check other users links and bookmarks. The second use is as a community of practice where you join groups of like-minded educators to learn and grow professional and if you want have an idea about the best educators groups to join on Diigo then check out this post
MentorMob allows you to create beautiful playlists of your links and you can share them with the rest of the world. Checkout my MentorMob page to learn more.
Storify lets you curate social networks to build social stories, bringing together media scattered across the web into a coherent narrative.