SoftwareLicenseManager

Want to sell desktop software (e.g. DotNet C# winform) and activate it via a key, this is how I did it for free. Use Woocommerce to sell license and enable your WordPress setup to act as a validator API (service). Maintained by Opzet on GitHub, where it has earned 26 stars from the community.

It's actively developed around autogen, ecommerce, keygen, and is a solid reference for anyone building with these tools.