[davnicwil]

Not actually sure which came first, this site or the term, but indiehackers.com [0] is one of the main internet communities built around this.

[0] https://www.indiehackers.com/

[wonderwonder]

Funny part is that indiehackers was purchased by stripe, meaning they likely ended up more financially successful than 99% of the startups posting on their site.