Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
wnr - Better than pomodoro, this timer app balances work and rest.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
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.