Web based, try Pixlr. Very similar

I second this. There is also a near infinite number of maps with the steam workshop, some of them are really good.

Yes but this would be all NSFW posts, not just porn.

That’s not exactly what I’m looking for either. Not all NSFW posts are actual porn. That’s why it’s be preferable to just ban the porn instances.

But thanks for the suggestion.

Only an option to Hide and Blur as far as I can find.

I would do that but I like finding new communities.