Void Linux is a rolling-release distribution not derived from any other distribution, uses LibreSSL as its OpenSSL replacement, uses Runit as its init system rather than systemd, and uses XBPS as its BSD-licensed packaging system.
I hadn't tried Void Linux in quite a number of months, but installed it on a Skylake test bed this weekend. The purpose, of course, for the Void Linux installation was in the name of benchmarking... Void Linux will be included as part of the big Linux distribution comparison to be published on Phoronix soon. In prepping for the Void Linux testing, I also had the wife try out the distribution and she added XBPS external dependency handling support for the Phoronix Test Suite.
Stay tuned for the benchmarks. If this is your first time learning about Void Linux, visit the project's site at VoidLinux.eu.