Mono draw is in maintenance mode and non-free. Based on the name, pretty sure that Monosketch is an explicit replacement.
> Based on the name
I think in this case the name alone is not enough to suspect a replacement; perhaps it’s just a similar product in the same domain (_mono_space visual editors).
Maybe it's just more or less feature-complete? Was curious, as someone who hadn't heard of it before, so I checked the blog. Last post is from April last year and concerns public testing of a new release. That's not particularly old, if you ask me?
Monodraw got an update the other week. It isn't being changed, but it doesn't need to.
Great little app. And it's $10, once. Hardly breaking the bank.