Free calc is a simple multi platform calculator program.

slimcat - still concatenating files and printing on the standard output, just slimmer.

Portable OpenBSD vi, originally distributed as part of 4BSD

🚂POSIX, BSD, XSI, and SystemV echo

Message queues skeleton for integration processes

Atari Lynx emulator and debugger for macOS, Windows, Linux, BSD and RetroArch.

RCS (revision control system) re-implementation by OpenBSD

ncurses-based sprite editor

https://briancallahan.net/blog/20220220.html

Fork of classic BSD games, with improvements to cribbage

A clone of linux free tool (No code sharing)

bsd 2-clause licensed shuf

Extremely minimal coreutils implementations

Run a process detached from the controlling tty

tiny file-system watcher for BSD

Implementation of hash table using <sys/queue.h> macros.

Source code of the open source version of holOS, an operating system based on FreeBSD

4.4BSD Lite Release 2: for networking source code reading

BonesBSD is a fork of the OpenBSD kernel.

Torchbearer of the original operating system distribution - system tree