A simulator of Xilinx PicoBlaze soft-processor, runnable in browsers.
Cross-platform IDE for developing embedded solutions and desktops
uIDE (Micro IDE) is a free, open-source IDE for GPUtils
Emulator for Lockheed Electronics Company MAC-16 minicomputer (1969)
A didatic processor simulator
Relaunch64 is a program (text-editor) for C64-asm-coding.
Java classfile assembler/disassembler and interactive low-level editor