I found Nim to have a small but active and supportive community. The library ecosystem, while a little thin, has a lot of activity, and I was able to find what I needed or create wrappers for C libraries.

One difference between the Swift and Nim communities is that where Swift's is full of noobs answering each other's questions, Nim's is full of experts who are just as eager to help.

Nim also has pretty good, fairly complete docs and a decent book.