Software: free and open source code
License your software.
You can choose the GNU GPL or LGPL wrapped with a Creative Commons deed and metadata:
License your software under the terms of the Free Software Foundation’s GNU General Public License. You can also choose the FSF’s Lesser GPL.
Learn about other free and open source software licenses at these sites:
Need a place to develop your software?
Here are places that will host your free or open source software project for free:
Want to help Creative Commons develop software?
Check out our developer community. We have lists, a wiki, IRC, subversion, and lots of challenges just for you!