Themes For App : https://themesfor.app It is a site where you can download free bootstrap templates for your side-projects. I've been running it for over 5 years now and earned zero out of it. First thing that I want to mention is that in the first place, it was not my primary intension to earn from it but from the start of this year I have started looking forward to monetizing it. At the moment it costs me $0 to run except the standard domain cost. But in starting it costs me $500+ for the ESP.