One Clause BSD Licence

Very permissive open source license, not an official license but rather a number of versions that seek to cut down the BSD licence to the bare minimum and be functionally the same as placing the in the public domain, while still retaining copyright. See also: Two Clause BSD Licence, Three Clause BSD Licence, Four Clause BSD Licence, MIT Licence and ISC Licence.

Disclaimer
Note that the licence text below is here for reference purposes and unlike other material on the EDM/2 Wiki is not under the Attribution-ShareAlike 3.0 licence and should be treated under its own terms, or if an addition by the combined terms of the addition and the licence that it is an addition to. As it is a licence with fixed terms the text below it should not be modified except for formatting purposes, if a more recent version is published a new page should be created for that licence since software packages that do not get updated will continue to be governed by the terms of the older licence.

Text of licence with disclaimer
Copyright (c) ,  All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the source code distribution retains the above copyright notice and the following disclaimer.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Text of license without disclaimer
Copyright (C) , . All rights reserved.

Permission is granted to use at your own risk and distribute this software in source and binary forms provided  the above copyright notice and  this paragraph are preserved on all copies. This software is provided "as is" with no express or implied warranty.