[lemcoe9]

I'll answer this, even though I think it's just karma-bait.

My best passive income is a piece of software I made in one week that processed payments for school events (field trips, clubs, etc). I've made over $120,000 in two years with it.

[HarryN]

Great job! What made you make it in the first place? Did you know there was a need for it?