DeSmuME is a Nintendo DS emulator
Simple way to check root/virtual app/emulator/xposed framework
Super Nintendo (SNES) emulator focused on performance, features
higan is a multi-system emulator focused on accuracy & preservation
Android virtual machine and deobfuscator
Graphical SFTP client and terminal emulator with helpful utilities
Reverse engineering framework in Python
Slows down any given Windows process (written in C#)
Atari 2600, C64, Python, 3D engines and rock'n roll
Windows XP reimplemented on Nintendo DS
Highly portable Gameboy Color emulator
Log and Play Retro Controller Inputs
DirectX 1-11 to OpenGL wrapper
Simple 8-bit Assembler Simulator with Angular.js
z390 Portable Mainframe Assembler and Emulator
Java-based instruction level emulator of MSP430. Code on github.