Greasemonkey is a Firefox extension that allows you to customize the way webpages look and function.



Greasemonkey is the most popular Open Source & free alternative to Powerlet.
- Greasemonkey is Free and Open Source
- Greasemonkey is Customizable
Powerlet is described as 'Quickly find and run your bookmarklets' and is a userscript manager in the web browsers category. There are more than 10 alternatives to Powerlet for a variety of platforms, including Mac, Mozilla Firefox, Windows, Linux and Android apps. The best Powerlet alternative is Greasemonkey, which is both free and Open Source. Other great apps like Powerlet are Violentmonkey, Tampermonkey, FireMonkey and Userscripts.
Greasemonkey is a Firefox extension that allows you to customize the way webpages look and function.



Greasemonkey is the most popular Open Source & free alternative to Powerlet.
Violentmonkey provides userscript support for Chrome, Opera, Maxthon and Firefox supporting most scripts for Greasemonkey and Tampermonkey.



Tampermonkey is a free browser extension and the most popular userscript manager for Blink- and WebKit-based Browsers like Chrome, Opera Next and Safari.




Tampermonkey is the most popular Windows, Android, Mac & Linux alternative to Powerlet.
Firemonkey is a totally new combined user-Scripts and user-Style manager. While it has similar functions to other user-Script managers like GreaseMonkey/Tampermonkey/Violentmonkey, and user-CSS managers like Stylish/Stylus/xStyle, there are also differences.





Launchlet is the most popular Web-based alternative to Powerlet.
Macaque is a UserScript Manager Browser Extension. Macaque provides you the ability to add, edit, remotely edit, as well as view the console logs for each UserScript!.




Macaque is the most popular iPhone & iPad alternative to Powerlet.
Macaque is the most popular commercial alternative to Powerlet.
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.


Frida is the most popular Self-Hosted alternative to Powerlet.
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.
