Another was what became Certify The Web, which is now the most popular UI for automated certificate management on Windows and is most definitely now a commercial product (but 90% of users use the free version). I originally had a donate button and did get a couple of donations, maybe 4 or 5.
It was getting thousands of downloads per week and the company I was working for went into administration, so on the same day I added a Paypal button to the website for people to buy a license key and got my first sale later that evening. It's now had around 10K customers over 7 years and they renew their license key each year. Some people/companies do indeed want support and updates (I offer email support only, or there is a community forum). Nowadays most purchase via Stripe,