Wt

Wt has two licensing options. Unless you buy a commercial license from emweb, you're using wt under the GPL v2 license. The GPL essentially requires you to give the source code of your software to your customers, and to allow your customers to redistribute the software to others for free. For more information, see http://www.gnu.org/licenses/gpl-faq.html

The alternative license sold by emweb has no such restrictions and is more appropriate for commercial use.

BR,

Wim.