ATasm is a 6502 command-line cross-assembler.
CSS validation and advanced preprocessor with nesting and variables
BeaEngine disasm project
toolchain for obfuscated compilation
Keystone assembler framework: Core (Arm, Arm64, Hexagon, Mips, etc.)
A machine code manipulation library for Intel 64 and IA-32.
Cross-platform 6502 assembler
A Java VM for ARDUINO and other micros using the leJOS runtime.
Libraries for CPC game development under z88dk and SDCC
GNU assembler/disassembler and other tools for the OR1K64-based KPU
Visual MASM - Assembly IDE for Microsoft MASM
Creates APNG animation from PNG/TGA image sequence.
BCPL was designed by Martin Richards at Cambridge University (1966)
Deconstruct APNG file into a sequence of PNG frames.
An assembler and disassembler for the JVM (Java Virtual Machine)
A software for upload .hex files to ATMEGA328P and compile .asm files
LEGO EV3 Utilities and Assembler
Japheth's assembler, JWasm