A boat building forum, a reel repair forum, a Kia Niro subreddit, and here. Not much posting in any of those this year...too busy with hobbies and w*rk. I haven't been very good saying "No" when the consulting phone rings.
You may find this helpful. https://grammarist.com/usage/fora-forums/
Now I just need to figure out "fish" vs "fishes".
There have been several I've been very active on over the years but now it's just this forum, a Facebook writing group that I kind of hate and have a history of leaving for a year at a time, and a Reddit group on teaching that I'm somewhat new to. I would probably be active on a certain writing forum but I got banned for the second time not too long ago. The first time was about 5 years ago. They didn't know it was me again, they just can't handle the likes of me.
I love FlightAware. Especially when traveling or looking up and wondering where some plane is going. I enjoy the shipping equivalent as well - Marine Traffic - as we live on the shores of The Great Lakes and see many ships coming and going.
city-data.com
bogleheads.org
askandyaboutclothes.com
styleforum.net