Popplet is getting GREAT reviews and I must agree with them! Better yet... this amazing tool is FREE! Popplet is designed as a big "pinboard" where you can put "popples." The only feature I am not thrilled about is that in order to create an account, you must provide an email address. Our students still do not have email addresses. That causes a big problem for us! If it weren't for that I would be using it with them right away! I do agree that Popplet combines the best features of other online sticky note services (like Wallwisher) and mind-mapping sites (like bubbl.us.) For more information and to find more sites like Popplet, Wallwisher, and bubbl.us follow the link below.
Collaborative Sticky Note Sites: