Keygen - https://keygen.sh https://keygen.sh Keygen provides a hosted SaaS product and app licensing API. Support for self-hosting Keygen is planned. Currently

Keygen - https://keygen.sh https://keygen.sh Keygen provides a hosted SaaS product and app licensing API. Support for self-hosting Keygen is planned. Currently in closed beta, but have a few contracts lined up already so it should be profitable from day 1 after launch. I have a couple other side projects that are barely profitable, but none of them seem to have the kind of market Keygen has.