This is a simple tool for creating avatars. Drawbacks: a few features are only accessible if you create a DoppelMe account and are logged in. However you can still create cool avatars (and save them) without an account.
Unit 2. (Favourite tool ) http://www.makebeliefscomix.com/ It is a comic strip generator, available in several languages.Free and no login required. You can choose from pre-made characters, backgrounds , items and balloons where insert text in. You get the gist of it in minutes.