Stella - Stella is a multi-platform Atari 2600 VCS emulator released under the GNU General Public License...
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
WinUAE - WinUAE is a Windows port of the emulator UAE.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
jGameBase - jGameBase is a fully-featured retro-gaming emulator frontend and game database utility.
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.