OMG! This is the best thing I've ever found! :3 How to make your own Marauder's Map!!!! Click the link to go to the site and see the instructions step by step or see the larger version of the picture above!! <3
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.