Reciprocal Licenses

GPL v2 GPL is the most widely used free software license and is fully reciprocal. Derived works must be distributed under the same license. View full license »
Required
  • Copyright inclusion
  • State changes
  • Disclose Source
  • Warranty
Permitted
  • Commercial use
  • Modification
  • Distribution
Forbidden
  • Liability
  • Sublicensing
GPL v3 Version 3 of the GPL adds a clause that requires source code when distributed on hardware devices. View full license »
Required
  • Copyright inclusion
  • State changes
  • Disclose Source
  • Warranty
Permitted
  • Commercial use
  • Modification
  • Distribution
Forbidden
  • Liability
  • Sublicensing
LGPL v2.1 Primarily used for software libraries, LGPL requires that derived works be licensed under the same license, but works that only link to it do not fall under this restriction. View full license »
Required
  • Copyright inclusion
  • Nonstatic linkage
Permitted
  • Commercial use
  • Modification
  • Distribution
  • Sublicense
Forbidden
  • Liability
LGPL v3 Version 3 of the LGPL is an additional set of permissions to the GPL v3 license that requires that derived works be licensed under the same license, but works that only link to it do not fall under this restriction. View full license »
Required
  • Copyright inclusion
  • Nonstatic linkage
Permitted
  • Commercial use
  • Modification
  • Distribution
  • Sublicense
Forbidden
  • Liability