Virtual Cork Boards
Padlet/WallWisher: share a single website with your group, and everyone can add brief sticky notes to your wall.
Lino: is all about collaboratively placing photos and sticky notes on a board, great for planning!
Biteslide: is a kid-friendly scrapbooking app with limited text options.
Real Time Board: Robust, collaborative shared board with linking to Google Drive, and much, much more. Currently in beta.
Note App: Sticky note sharing
Spaaze: And another collaborative corkboard
Flisti: an online poll tool that doesn’t require a signup
AnswerGarden: is a way to get feedback on a blog or site by asking a question, and responses fill a space in a type of tag cloud.
Socrative: much more than an online poll, Socrative allows teachers to engage students with quick quizzes, games, questions, and other items using their mobile devices...getting real time feedback.
Active Prompt: image based poll...you create or choose an image, students vote by placing a dot in the location, and you can see a heatmap of responses on the image.
Murally: allows collaborative pinning of images, video, text, and also allows basic presentation mode on a community board.
Lucid: Mind mapping, flow charts, etc. free educator options.
Slatebox: Mindmapping tool like Popplet but a bit more technical
Pearltrees: Explore related interests with others on the web by connecting pearls and creating trees
MindMaple: another visual mind mapper
Trello: is all about project planning in a visual way
SpicyNodes- beautiful, animated mind mapping, collaboration only available with paid version
Edynco: Mindmapping, includes zooming, uploadable video and files
Processon: a collaborative mind-mapping space with adjustable privacy and group settings.
Stoodle: Use your mic, and no account creation is required. From the great folks at ck12! Click "launch a classroom," name your room, and share the URL assigned to your room.
Draw It Live: Work together with other people to draw in real time. Create a whiteboard and share its URL to allow other people to join in. No password is required, and no special plugins. Includes a chat box for group communication.
Flock Draw: This is a painting & drawing tool. It makes it easy to draw online free with multiple people for fun or business. You can have unlimited people in a room.
Twiddla: a no-setup, web-based meeting space (free pro accounts for teachers)
Screenleap: allows instant screen sharing to any browser, with no downloads or sign-ins:
WeVideo: amazing, collaborative video editing.
Vyclone: very cool site for 13 and up...record an event or scene from multiple angles from multiple android and/or ios devices, and then collaboratively edit them together into a single video.
Wirewwax: tagable interactive video tool
Videonotes: take notes that sync and are saved with time stamps in your Google Drive to any youtube, Coursera, Khan, etc. video. Share the video and notes just like you share your Google Docs.
Jeporady Labs: Create your own Jeopardy Game with these great templates (great for IWB or Projection)
SideVibe: Create an interactive overlay that floats over any webpage
Flubaroo - Grade online assignments in a single step
Textivate: creates a range of interactive browser-based activities based on any text you put into a textbox. (Texts of up to 500 words and/or up to 100 matching items).
Equizshow: Build templates and quiz shows on any topic.