The TAPR Open Hardware License is a license used in open source hardware projects. It was created by Tucson Amateur Radio Package (TAPR), an international amateur radio organization. Version 1.0 was published on May 25, 2007.
The Simputer General Public License , or the SGPL is a hardware distribution copyright public license Drafted SPECIFICALLY for the purpose of distributing Simputers . As a license it has been loosely modeled on the GPL but in substance it is very different.
The CERN Open Hardware License ( OHL or CERN OHL ) is a license used in open-source hardware projects. It was created by CERN , which published version 1.0 in March 2011. Version 1.1 was published in July 2011.  Version 1.2 was published in September 2013.