There is also Minikanren. While not the same as Prolog, it still allows you to do similar reasoning from inside your language. I always found the talk by Byrd a

There is also Minikanren. While not the same as Prolog, it still allows you to do similar reasoning from inside your language. I always found the talk by Byrd and Friedman about it at RacketCon fascinating and wish I would get to use it or something like it at $job.