Nice brainstorming/concept mapping tool with lots of features, even in free version. Includes several templates, ability to include images, stamps, links, maps, more.
Enter a problem, and a unique URL is created. Once shared with others, a group can collaborate by adding questions, comments, solutions, etc. Very easy to use and effective way to solve problems.
Truly cool tool from Google inspires learners' questions and projects. Input what you are good at, what subject you enjoy, and what you want to do, and Google provides a tapestry (Yes, I just used the word "tapestry.") of links, videos, books, and other resources to get the creative juices flowing.