Alternatives to NinjaKit for all platforms with any license

  • Greasemonkey icon


    Customize the way a web page displays or behaves, by using small bits of JavaScript.

    Open Source Mac Windows Linux Firefox

  • Stylish icon


    Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for websites and even customize...

    Open Source Mac Windows Linux Chrome Firefox

  • Tampermonkey icon


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

    Free Personal Mac Windows Linux Android Chrome Opera ... Opera Next Chromium Firefox

  • Violent monkey icon

    Violent monkey

    Violentmonkey provides userscript support for Opera, Maxthon, and Chrome, supporting most scripts for...

    Open Source Mac Windows Linux Chrome Maxthon Opera

  • Scriptify icon


    Create and manage add-ons made from Greasemonkey and Scriptish user scripts

    Open Source Windows Firefox

  • Site Connector icon

    Site Connector

    Reuse data from one website on another. Try Site Connector, a fast and convenient productivity boosting extension.

    Free Mac Windows Linux Chrome OS Chrome

  • GreaseKit icon


    GreaseKit is a SIMBL plugin, that adds user scripting to Safari, Mailplane, Diet and all WebKit applications.

    Open Source Mac Safari SIMBL

  • reShape-Craigslist icon


    Do you think Craigslist is tough to navigate? Or maybe you think it looks like it's from the 1990's? Maybe you think it's...

    Free Web / Cloud

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