None yet, but Russ Nelson left a comment on a Slashdot article about using Fundable for open source software saying that he has plans to modify the Public Software Fund so it allows for dominant assurance contracts.

Just in case the people behind Fundable were not aware of the concept I just suggested that they also offer dominant assurance contracts.

Separately, see Kragen Sitaker’s explanation of assurance contracts as put options inspired by Anton Sherwood’s description of using call options rather than eminent domain to acquire land for a road or pipeline.