SideVibe is a cloud-based tool similar to Evernote https://evernote.com and Diigo https://www.diigo.com, which successfully took over the bookmarking Delicious https://delicious.com/

Besides “anwhere/anytime” bookmarks, the new generation of Diigo, Evernote and SideVibe offer taking, of screen snapshot, notes, drawings etc., thus making them perfect for educational purposes

Here is a K12 teacher’s account on the use of SideVibe in class: http://datafiend.wordpress.com/2012/03/21/using-sidevibe-in-class/