nosh: Linux/BSD init, with systemd compat (homepage.ntlworld.com)
recommended by 2 users | 2015 | 145 points by lvh | cloud & devops | original thread |
2 users recommended this thread. What they said:
brudgers May 27, 2016 | on: BSD/Linux init with systemd compatibility | context
cm3 Jul 28, 2016 | on: FreeBSD Q2 2016 Status Report | context

The strongest contender (which also happens to be cross-platform), from what I can tell, is nosh (https://news.ycombinator.com/item?id=10493926).