'''BSD-licenserne''' er en familie er [[fri software|frie]]/[[open source]] software licenser. Den første version af BSD-licensen (4-klausul BSD-licensen) blev brugt til det oprindelige [[BSD]], et [[UNIX]]-lignende [[operativsystem]], efter hvilket licensen er navngivet. Licensen er flere gange blevet modificeret, og disse deriverede licenser kaldes "modificerede BSD-licenser". Alle varianter af BSD-licensen, bortset fra den oprindelige 4-klausuls BSD-licens, er godkendt som frie/open source licenser af [[Free Software Foundation]] (FSF) og [[Open Source Initiative]] (OSI).<ref>{{cite web | url = http://www.opensource.org/licenses/BSD-3-Clause | title = Open Source Initiative OSI - The BSD 3-Clause License | Open Source Initiative | access-date = 2012-06-06 | author = Open Source Initiative}}</ref><ref>{{cite web | url = http://www.opensource.org/licenses/BSD-2-Clause | title = Open Source Initiative OSI - The BSD License:Licensing | Open Source Initiative | access-date = 2012-06-06 | author = Open Source Initiative}}</ref><ref>{{cite web | url = http://www.gnu.org/licenses/license-list.html#ModifiedBSD | title = Various Licenses and Comments about Them - GNU Project - Free Software Foundation (FSF): Original BSD license: Modified BSD license | access-date = 2012-06-06 | author = Free Software Foundation}}</ref><ref>{{cite web | url = http://www.gnu.org/licenses/license-list.html#FreeBSD | title = Various Licenses and Comments about Them - GNU Project - Free Software Foundation (FSF): Original BSD license: FreeBSD license | access-date = 2012-06-06 | author = Free Software Foundation}}</ref> Den oprindelige BSD-licens er godkendt som fri software licens af FSF<ref> {{cite web | url = http://www.gnu.org/licenses/license-list.html#OriginalBSD | title = Various Licenses and Comments about Them - GNU Project - Free Software Foundation (FSF): Original BSD license | access-date = 2012-06-06 | author = Free Software Foundation}}</ref>, men er ikke godkendt som open source licens af OSI pga. af "reklame-klausulen" (den tredje klausul i den oprindelige BSD-licens).
