Sticky notes. In this new V4 release, Diigo's annotations user interfaces have been improved and additional view annotation filters are added.
Here is a basic "how to add sticky note" tutorial: Sticky notes basics: there are 3 kinds of comment options in Diigo: (1) "In-situ Sticky Note" ~ sticky note associated with a highlight Since the associated highlight and sticky note are persistent and very targeted, they allow you to jot down your comments directly on any part of a webpage and scan through all your research findings quickly.
Padlet is the easiest way to create and collaborate in the world. Lino - Sticky and Photo Sharing for you. 32 Interesting Ways to Use Wallwisher in the Classroom. Mural.ly. Jjot - Take notes online, fast. Postica . stick it!
Edistorm - Edistorm - Online Brainstorming and Planning. Add a sticky note and post it online. For Flexible Online Creation Collaboration and Sharing. Listhings - take sticky notes online. PinDax.com - The perfect message board for building your community. GroupZap — Welcome. Collect, Organize, Share. Me - Personal and collaborative sticky notes web-app.