Open Hardware License

Directory of specific Open Hardware Licenses used in concrete projects

1. TAPR Open Hardware License
2. Simputer GPL, 'SPGL'; the GPL modified for hardware [1]
3. Balloon Licence, by the Balloon Project [2] (essentially GPL, with a limited basic design to guarantee standardization)
4. Hardware Design Public Licence [3] (again, aiming at GPL-style effects)

Other, not hardware-specific licenses used

1. GPL, used, e.g., by OpenSparc by Sun [4]
2. The MIT Licence, used, e.g., by the LART project [5]

More Information

See our directory of Open Hardware projects at Product Hacking to identify such projects