See Your Family TreeEdit This Page
From FamilySearch Wiki
Click here to see a demo.
Note: The above link takes you to createfan.com where only users of new.familysearch.org are able to create a fan. Geni users can go to treeseek.com in order to print a fan. And both new.familysearch.org and Geni users can also create some other fun charts there.
If you want to look at some nicer charts and you don't mind spending some money there is another site for the Family Chartist that you should go visit.