I wrote a mildly successful article on the topic: https://filipesilva.me/blog/12-ideas-for-programming-projects-too-dangerous-not-to-build/ https://filipesilva.

I wrote a mildly successful article on the topic: https://filipesilva.me/blog/12-ideas-for-programming-projects-too-dangerous-not-to-build/ https://filipesilva.me/blog/12-ideas-for-programming-project... I include a, not very scientific, evaluation of each idea according to profitability, complexity and complexity. Also some real examples of each idea.