https://www.khanacademy.org/ This site holds thousands of videos, interactive lessons, and assessments on a wide range of topics.
http://www.livebinders.com/ This site is just like a 3-ring binder except online. Instructors can use it to organize material in a course so that students have easy access to the material.
prezi.com A presentation website that exceeds the capabilities of PowerPoint by capturing the audiences attention in a variety of ways.