And, after what has happened with Jam...
It's okay to mention the name:
Jambler
But there seems to be some confusion around promotion. It would be allowed to post even a positive review thread for ExampleMixer, just as long as you don't post the URL and you don't violate the other rules. Promotion is only disallowed in signatures, avatars, and profile-bios; not posts.
I feel that considering a CoinJoin coordinator as mixer is just fine (since gray area is no longer acceptable).
I wanted ask clarification on this in the "banned" topic, but after reading it again, it doesn't meet all criteria:
Something is considered a mixer if it meets all of these requirements:
2. It is possible for the mixer to steal property passing through it.
I assume this exception was intentional for non-custodial privacy services.