Home assignments are a great way to evaluate a candidate. A "one hour" project would not be sufficient for that, the problem would be too easy.

I find it weird that you guys don't want to spend some time to show your skills to the employer, without getting paid. These are not real projects. You're not benefiting the employer when you finish them. They also spend some time evaluating your project submission.

(I'm not talking about the companies trying to make people work free by giving them parts of the real projects in disguise)