The first one is essentially akin to releasing in the public domain, whereas the second is the MIT/ISC license distilled down to its very core.
[1] http://landley.net/toybox/license.html
[2] http://opensource.org/licenses/fair
WTFPL has come in for some stick about the lack of a warranty clause, so last time I had to choose a licence, I perverted it into the FTWPL: https://github.com/systemed/tagmangle/blob/master/LICENCE.tx...
The first one is essentially akin to releasing in the public domain, whereas the second is the MIT/ISC license distilled down to its very core.
[1] http://landley.net/toybox/license.html
[2] http://opensource.org/licenses/fair