I built a free Unicode to Shree Lipi converter to solve an old DTP problem: converting modern Unicode text for legacy workflows. It’s a niche problem, but surprisingly common among Indian-language designers and publishers. https://unicodetoshreelipi.com/
The interesting thing about niche tools is that they often solve problems large platforms ignore because the audience looks too small.
This kind of legacy workflow gap can have strong demand if you reach the designers and publishers still dealing with it daily.