Void Linux is not a fork! It is an independent distribution, developed entirely by volunteers. Unlike the majority of other existing distros, it is not a modification of an existing distribution; its package manager and build system have been written from scratch.
Void Linux so far supports, in addition to several different processor architectures, two different implementations of the C standard library:
XBPS allows users to quickly install, update and remove software; software is provided in binary packages or can be built directly from sources with the help of the XBPS source packages collection.
Currently there are over 7000 optimized binary packages for the x86, x86_64, ARMv6, ARMv7 architectures; also there's support to easily build (either natively or cross compiling) from sources any package that is available in the XBPS source packages.
xbps-src is the XBPS package builder, written from scratch with a 2-clause BSD license. This builds the software in containers through the use of Linux namespaces, providing isolation of processes and bind mounts (among others). No root required! Additionally xbps-src can build natively or cross compile for the target machine, and supports multiple C libraries (glibc and musl currently).
Void Linux uses runit as its init system and service supervisor — a simple and effective approach to initialize the system with reliable service supervision and minimum overhead.
Void was the first distribution to switch to LibreSSL by default, replacing OpenSSL. Due to the Heartbleed fiasco we believe that the OpenBSD project has qualified to provide a more secure alternative as it has pro-active developers.