Von Neumann was admonishing people who built assemblers (Snapshot from a book called The History of Fortran)

Borland Turbo Assembler Version 5 User's Guide

First invent the universe: How I built a language-embedded assembler and used it to write my own GameBoy game

GCC assembler syntax quick reference

Compile time assembler for C++ with nasm syntax (implemented in template metaprogramming)

Show HN: I spent my vacation writing a modern JVM assembler

GitHub - roscopeco/jasm: A JVM assembler for the modern age

8-bit Assembler Simulator for educational purposes

Fresh – visual assembly language IDE with built-in FASM assembler

Nasm – A cross-platform x86 assembler with an Intel-like syntax