These tools allow you to create outlines -- i.e. hierarchically structured content -- in which you can open and close levels of the structure as needed.
From the homepage of this tool: "Thinklinkr has one of the fastest, simplest, and most innovative interfaces on the web and it will change the way you work. Meetings, brainstorming, and lectures will be fundamentally different for you. You will be more productive, organized, and connected with what's going on in your brain. Leave thinklinkr open for a day, use it to organize your thoughts, and you won't ever want to turn it off."
In "hybrid" classes, a significant amount of the course learning activity has been moved online, sometimes making it possible to reduce the amount of time spent in the classroom. The University of Wisconsin has a detailed website that outlines examples, best practices and questions to ask when designing a blended course