Good news, SimThyr has been curated by SciCrunch.
SciCrunch, a "cooperative and collaborative data and resource discovery platform for scientific communities", is a key tool of the Resource Identification Initiative. From now on, authors can easily cite SimThyr by adding its RRID to their papers.
See http://scicrunch.org/browse/resources/SCR_014351 and https://www.force11.org/group/resource-identification-initiative for more details.
From now on, you may cite SimThyr properly as (SimThyr, RRID:SCR_014351).
J. W. Dietrich