My personal vote is to get people working on OCL linkage to OpenMRS, and on Monday’s design forum Jon Payne and I will be working on some workflows in this general area. (I’m not sure how it fits the refapp though.)
One possible thing is Drug Order Entry. I started this thread based on an offline conversation with Daniel about needing a good JavaScript project for an Andela team: Porting Order Entry UI to ReactJS and adding it to the reference application?