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.
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
HTTP Toolkit - Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.