I'll start!
What?
My first product was MakerBox Tools. It's a list of 600+ tools with great free plans for Makers
https://www.makerbox.club/tools
Why?
We had 2 reasons:
1. We wanted to start with SaaS at first, but soon we found out that subscriptions cost too much. So, we decided to collect tools with great free plans that can help indie businesses not to spend a fortune 💰
2. It was a safe start. We spent 1 month building and testing the product. If we failed, we wouldn't lose motivation to make our products. Happily, we didn't fail.