Brian Callahan

oksh. Portable OpenBSD ksh, based on the Public Domain Korn Shell (pdksh).

pl0c. Self-hosting PL/0 to C compiler to teach basic compiler construction from a practical, hands-on perspective.

mg. OpenBSD Mg editor. Portable Public Domain Micro Emacs for *BSD, Cygwin, Linux, Mac OS X.

8088ify. The famous Intel 8080 CP/M 2.2 to Intel 8086/8088 MS-DOS assembly language translator.

oed. Portable OpenBSD ed(1) editor.

l80. CP/M and MS-DOS COM executable linker written in D.

baseutils. Portable OpenBSD userland utilities

yacc. Portable OpenBSD Yacc.

a80. Intel 8080/Zilog Z80 assembler written in D.

O. Peephole optimizer for QBE

make. Portable OpenBSD Make.

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

snakeqr. Game of snake that fits in a QR code.

bf256. Brainfuck compiler under 256 bytes in size.

sprite. ncurses-based sprite editor

m4. Portable OpenBSD m4.

echo. Learn how argc and argv are passed from environment to Unix program.

d80. Intel 8080/Zilog Z80 disassembler written in D.

bf.ssa. Brainfuck compiler written in QBE IR.

LiteBSD-Ports. The LiteBSD ports tree.

shuf. ISC licensed reimplementation of GNU shuf.

planck. The world's worst text editor, if it can even be considered a text editor.

libpuffy. Library to ease porting userland OpenBSD code to Serenity

i80. Intel 8080 emulator with built-in CP/M emulation

edx. Small Wordstar-like text editor for X11.

openbsd-ports-wip. Work-in-progress ports for OpenBSD

PPCTigerGCC. Native powerpc-apple-darwin8.11.0 gcc and friends.

repology. Command line interface for Repology.org

qbe. Mirror of https://c9x.me/git/qbe.git

easyconfig. Configuration for the rest of us.

ash. Port of NetBSD sh(1) to OpenBSD.

bfc. Compile Brainfuck to multi-platform assembly.

vce. Visual Code Editor

otar. Portable OpenBSD tar and pax

dqoi. Tiny X11 image viewer for QOI images.

getexecname. Get the pathname of a running executable on OpenBSD.

ar80. CP/M and MS-DOS library archiver utility written in D.

cowgol-utilities. Quick utilities in Cowgol to try out the language.

ocsh. Portable OpenBSD csh.

ogzip. Portable OpenBSD gzip utility

sysctlbyname. sysctlbyname(3) compat library for OpenBSD

libterminfo. Port of NetBSD libterminfo for other POSIX systems.

mgksh. OpenBSD ksh(1) and mg(1) in a single static binary!

nbc. Portable NetBSD bc(1) calculator.

coin. Command interpreter for Unix, for learning how shells issue commands.

libppc. Modernization effort (C11-C23) for Mac OS X PowerPC

dmake. Illumos make ported to OpenBSD

eva. simple Wirthian programming language

OpenRCS. Portable OpenBSD OpenRCS.

4q. Forth to QBE compiler

gcc-bootstrap. A shell script for easy bootstrapping of niche GCC languages (e.g., D)

libwordexp. Port of NetBSD wordexp(3) to OpenBSD.

cmb. OpenBSD port of FreeBSD combinatorics library/utility