Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
SnapTimer - SnapTimer is a simple, free, portable countdown timer for Windows.
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy