This one is a very basic CSAM scanner that goes through lemmy image storage and just deletes stuff it deems bad. https://github.com/db0/fedi-safety I havent tried it tho, so i cant attest to its quality.

Im sure there are tools made for mastodon too, since it has a lot more users.

PieFed has a number of features designed to democratize moderation - e.g. keyword filtering (allowing users to filter All, None, and even just Some content, of e.g. Musk or Trump or USA) facilitates individual end-users to curate their experiences so that mods don't have to be as aggressive at removing things.

Another cool feature is the user icons - like a brand-new account on the Fediverse gets an icon next to their name, as too does someone who receives let's say >10x more downvotes than upvotes, or a potential unregistered bot account that posts 10x more often but never replies to comments. These icons don't remove content like a moderator would, just label it so you can choose to use that knowledge however you wish.

Another one is that people looking for a less controversial discussion environment can auto-hide or even auto-remove content from your feed - I have these turned off but if someone would be offended easily and want not to see things that are heavily downvoted, they have this option. Here it is the combination of the entire community and the end user deciding their personal tolerance threshold that decides what content appears in someone's feed. There are also options to use "community members only" votes, to help separate drive-by votes from people who have not joined the community and were just scrolling All, e.g. for polls and such.

Oh yeah, PieFed has polls. Also flairs - both user and post. And categories of communities that are user customizable and shareable. It has a ton of new features, both related and unrelated to community moderation. Check it out!