Void Linux is described as 'Void is a general purpose operating system, based on the monolithic Linux kernel. Its package system allows you 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' and is a Linux Distro in the os & utilities category. There are more than 100 alternatives to Void Linux for a variety of platforms, including Linux, Self-Hosted, BSD, Windows and Mac apps. The best Void Linux alternative is Linux Mint, which is both free and Open Source. Other great apps like Void Linux are Debian, Fedora, Arch Linux and Zorin OS.
CRUX resembles Void, i.e. it follows similar ideas of BSD-like simplicity, but CRUX is much older, therefore more stable and more tested.