(details in the Help section)Extract the files you have downloaded, then:

The fonts presented on this website are their authors' property, and are either freeware, shareware, demo versions or public domain. The licence mentioned above the download button is just an indication. Please look at the readme-files in the archives or check the indicated author's website for details, and contact him/her if in doubt.

If no author/licence is indicated that's because we don't have information, that doesn't mean it's free.