Complex sentence: The WTFPL (Do What The Fuck You Want To Public License) is an infrequently used, extremely permissive free software license, which essentially is "no different from dedication to the public domain".
Split into simpler sentences: The WTFPL (Do What The Fuck You Want To Public License) is an infrequently used, extremely permissive free software license. It is essentially "no different from dedication to the public domain".