The Do What The Fuck You Want To Public License (WTFPL) is a free software license.
There is a long ongoing battle between GPL zealots and BSD fanatics, about which license type is the most free of the two. In fact, both license types have unacceptable obnoxious clauses (such as reproducing a huge disclaimer that is written in all caps) that severely restrain our freedoms. The WTFPL can solve this problem.
When analysing whether a license is free or not, you usually check that it allows free usage, modification and redistribution. Then you check that the additional restrictions do not impair fundamental freedoms. The WTFPL renders this task trivial: it allows everything and has no additional restrictions. How could life be easier? You just DO WHAT THE FUCK YOU WANT TO.
Full license text
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE Version 2, December 2004 Copyright (C) 2014 Sunny Luthra Everyone is permitted to copy and distribute verbatim or modified copies of this license document, and changing it is allowed as long as the name is changed. DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. You just DO WHAT THE FUCK YOU WANT TO.