There are 4 repositories under illumos topic.
All the UNIX and UNIX-Like: Linux, BSD, macOS, Illumos, 9front, and more.
Unified build system for OpenIndiana distribution components
Community developed and maintained version of the OS/Net consolidation
Nomad task driver for Illumos zones.
the history, present state and some ideas for the future of the core dump routines in FreeBSD
Avant-garde Network Application Server for illumos.
Download prebuilt binaries of some crates.io crates
SmartOS / illumos / Solaris port of Envoy; A C++ front/service proxy
An index holding some prebuilt crates for different platforms
Reviving Sun's adjoin-s10u5 (Solaris) application to join illumos to Active Directory 2012 or 2016
Hopefully a Vagrant Plugin which could be used to managed zones on illumos (OmniOSce)