Permissive licenses
Permissive licenses, also known as non-reciprocal licenses, include for instance the following licenses:
Public domain licenses
Public domain licenses include for instance the following licenses:
Weak copyleft
Weak copyleft licenses are file-scoped reciprocal licenses. These licenses, like Mozilla Public License, set the reciprocity to the individual files within the project, not the whole project. File change or reuse must be licensed the same way as the original file, but there are no requirements placed on other files combined in new projects.