Comment by senko

A few years ago I posted a link to my collaborative whiteboard web app (https://news.ycombinator.com/item?id=2886353) and got encouraging feedback.

Some five year laters, it's still very active, with some 100k monthly (free) users, and paying customers, with the (modest) revenue being poured back into development.

I had a few (5 or 6) more Show HNs over time, but those projects failed to gather outside (or keep my) interest.