To be included, a resource has to fulfill several requirements:
This site uses a very pragmatic definition of free. For something to be free simply means that users are allowed to use it without payment for an unrestricted period of time. Tools which are only free during beta testing are not added.
If you see a tool listed here that seems to be in violation of these principles, please send me an email about it. If I find that I agree with you will remove the tool from the site.