Buy J-Painter. Full redistributable license. 5 full version
US$ 999.00, EU€ 632.54, GB£ 509.09, AU$ 1078.65

Publisher's Description:

J-Painter is a fully functional raster image editor which allows to draw directly on a web page and upload the drawings to the server in JPEG, PNG, and GIF graphic formats.

• The Full redistributable license allows to use the editor at any number of Internet and Intranet servers, for example use the editor as a component of a redistributable web application.
   
• The license purchaser is supplied with his/her own license generator which allows to generate permanent or time limited license codes for any domain names.

This license doesn't include the product's source code.