Sleepycat distributed Berkeley DB under a proprietary software license that included standard commercial features, and simultaneously under the newly created Sleepycat License, which allows open source use and distribution of Berkeley DB with a copyleft redistribution condition similar to the GNU General Public License.
GNU General Public License | GNU Lesser General Public License | Apache License | GNU Free Documentation License | Mozilla Public License | Creative Commons license | pilot's license | marriage license | Free Art License | Driver's license | driver's license | station's license | Sleepycat License | RealNetworks Public Source License | Open Publication License | Ohio's standard license plate | liquor license | Intel Open Source License | Eclipse Public License | Creative Commons license (cc-by-2.5) | Creative Commons License | Commercial Pilot License | Commercial pilot license | Commercial driver's license | California Contractors State License Board | California contractor's license | Affero General Public License |