Barbie Pet Vet; Space Quest; Dragon Blast; Candy Quest; Dragon Dash; MOD Minecraft & tons more to choose from!!
The Turtle Academy website is a wonderful resource for students to learn and create with Logo. 20 levels of step-by-step interactive lessons.
Web-based Logo tool - TurtleOnline. This tool does not have the helpful lessons like Turtle Academy, but does have extensive and useful help pages that clearly explain each of the different commands.