I read your original comment as steeped in sarcasm that a single developer should even attempt to sully their good name by engaging in marketing. Actually surprised you were being serious.

OP has a product he enjoyed making, is providing real world utility, and that he isn't trying to turn in to a billion dollar company. The obvious solution is for him to pick up a phone, send out a few emails, and generally reach out to the local business community instead of sitting back and waiting to see if it will magically make money and he can hire a sales person to do those tasks instead for his hobby project that has grown too expensive for a single person but would barely qualify for justification at a business.