No, you are just limited to one app and instance at a time. But this should be more than enough to host your average website that gets a couple thousand hits a week.
From the FAQ (not sure if you can access it without being logged in though):
"Will you offer a free version of hosting?
Yes. You get one free application with one instance for 6 months. If you have one app that is using the free instance, you can delete it and you'll be able to create another free one to replace it."
From the FAQ (not sure if you can access it without being logged in though):
"Will you offer a free version of hosting?
Yes. You get one free application with one instance for 6 months. If you have one app that is using the free instance, you can delete it and you'll be able to create another free one to replace it."