Subtext is a free iPad app that allows classroom groups to exchange ideas in the pages of digital texts. You can also layer in enrichment materials, assignments and quizzes—opening up almost limitless opportunities to engage students and foster analysis and writing skills.
Living Junction is a fun and easy way to create social magazines around your hobbies and interests.
You can drag-and-drop your favorite rich media content to the pages of your magazine to bring the stories around your favorite topics alive. Each magazine comes with a set of social features which help to create micro communities around your favorite topics.
The magazines you create can be private to you and your closest friends, or public and shared with a community of like-minded people.
A.nnotate offers online document review, annotation, collaboration, discussion, sticky notes, pdf indexing, pdf markup, sticky notes online, comments on web pages to annotate pdf documents online with online stikis...
For years, I kept hearing how awesome Evernote was: how it could store everything you possibly needed, make it available everywhere, and how scores of people couldn't live without it. I tried it multiple times, and never saw the appeal until now.