Fiddler - Fiddler is a debugging program for websites.
Hello Many - The best UI assets from around the web
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Searchbase - Build Search UIs with drag and drop
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.
Pages - Pages for Mac is a word processor that offers tools needed to create documents.