Man in the Middle is described as 'Modify requests, inject JavaScript and CSS into pages' and is a userscript manager in the web browsers category. There are more than 10 alternatives to Man in the Middle for a variety of platforms, including Google Chrome, Mozilla Firefox, Microsoft Edge, Web-based and Windows apps. The best Man in the Middle alternative is Greasemonkey, which is both free and Open Source. Other great apps like Man in the Middle are Violentmonkey, Stylus, Tampermonkey and Stylebot.
Greasemonkey Port is a userscript manager for SeaMonkey, originally written by Aaron Boodman and currently SeaMonkey front-end maintained by Marti, Ratty and/or Farby with some backend support from Anthony Lieuallen and Johan Sundström.
Userscript's and userstyle's — simple extension to inject own JavaScript or CSS rules to any page.
Full featured multi arch/os debugger. The purpose of Dwarf is to simplify tasks while doing reverse engineering, cracking and security analysis on a process running on a mobile phone running either Android or iOS.
Frida is a free open-source dynamic instrumentation toolkit for developers, reverse engineers, and security researchers created and supported by NowSecure researchers.
