What standards exist for the exchange of genealogical information?
The GEDCOM standard has been moribund for many years since it was abandoned by the Mormon church. There have been a number of efforts to create a more robust and feature-full standard, but they've all collapsed under their own weight before achieving critical mass. One such effort was the Gentech Data Model developed in 1998 as the core of a next generation standard.
The answers to the related question What standards exist for the exchange of genealogical information? mention a number of more recent efforts including OpenGen, BetterGEDCOM, FHISO, and GEDCOM-X.
Are there any other alternatives to GEDCOM being actively developed? Where are they being discussed? How do the various efforts compare among them in terms of features, backers, technology basis, etc?