Coracle is not the only client, but it is one of the few and I think it was the first. WoT has been part of Coracle since before the replyguy spam attack last August. Then nostr:npub1utx00neqgqln72j22kej3ux7803c2k986henvvha4thuwfkper4s7r50e8 released his WoT relay in response to that attack.
I also like how Jumble has implemented WoT just for interactions, but not for original posts. This allows for still seeing every OP in a relay feed, while filtering out reply spam. Then, if you are seeing a bunch of OP spam, you know you should choose a different relay. 😂