[lucumo]

I know of these:

- Immutables - Autovalue - Mapstruct - Checker Framework

There's quite a list here https://github.com/gunnarmorling/awesome-annotation-processi... (Though I don't think Error Prone is actually an annotation processor, but rather a javac plugin.)

There's some irony in that Immutables and Autovalue are often named as alternatives for people that dislike Lombok's implementation but do like (some of) Lombok's features.