ufdbGuard - URL filter for the Squid web proxy
Fiddler - Fiddler is a debugging program for websites.
Blokk Font - Mock-up font for clients who do not understand latin.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
UI Generator - Generate Lorem Ipsum UI for your design task.
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.