Tsū is a free social network that gives the revenues back to you. Instead, we focus on payments. It's the right thing to do. Share your member url and start building your family tree. / www.tsu.co/roli1968
Zunal is a webquest maker (free) that allows you to create your own webquest and share it. You can embed videos and other materials, and you can have more than one person working to create the same one, so it's great for group projects as well. There is a wide variety of already-created quests, or you can make your own.