I'm mostly retired from a lifetime as a graphics programmer and CTO, and now I'm working through my lifetime of fun backlog projects. https://pcons.org, https://deep-timeline.org, https://pelorus-nav.com, https://packzen.org, https://github.com/garyo/sea-surface-temp-viz, https://globe-viz.oberbrunner.com/ and lots more. All open source and free.
Sure, make money from software. I did. But when you have enough and it's time to give back, open source it.