I started using Metroretro a few months ago and it's really nice, except for the ability to export retro items I think it covers everything you listed. Also it's free and it comes with some useful templates. Source: about 3 years ago

To improve the developer experience, I needed to understand the real problems the engineers were facing, so I scheduled a brainstorming meeting. In this meeting, I explained my project and shared a Metro Retro board to write down all issues our application had at that time, what was the bad DX we had, and doubts related to this application (e.g. How do we handle data fetching?; how do we handle error handling?;... - Source: dev.to / about 3 years ago

I agree that shoflo is too expensive. But its far superior to rundowncreator.com in a few ways. Source: about 3 years ago

What is up with Broadcast software providers? Is a reskin of a google doc worth 900$ a year for ONE SEAT? Is an iPhone app worth 400$ a month for unlimited licenses (only one at a time active user though). What the hell is wrong with them? Why is there such a huge disparity? On one hand you have Shoflo charging a grand a year for a seat for every individual feature on their webapp, then rundowncreator.com... Source: about 3 years ago