Aeon Timeline v2.2.2 (for Mac), out recently, offers a new capability to sync with Ulysses projects. Aeon has always (?) had the ability to sync with Scrivener, and it is interesting that it is extending this feature to other writing environments. I believe Aeon was originally developed as a sort of cousin of Scrivener, and it's good to see it branching out.

Haven't tried the Ulysses sync feature to any extent -- I'll save that for a pleasant weekend CRIMPing :-)