[jamil7]

Maybe building a consumer app for iOS/Android - you can pick a pretty standard idea or look through the list of popular apps and implement something similar with IAP. You won't make a living doing this without serious investment in marketing, sales and product but you can probably bring in a little bit of $ per month. I guess I would question the efficiency of this based on your hourly rate and how long you'd spend building this versus just donating money or time directly to charity.