Violentmonkey - Violentmonkey is a userscript manager to support running userscripts in web pages.
Stylebot - Change the appearance of websites instantly. Preview and install styles created by other users on stylebot.me
Greasy Fork - A site for user scripts.
Dark Reader - Reduce eye strain in your browser with this extension that provides a dark theme for browsing.
Database Script Tool - Database Script Tool is an all-in-one functional code generator that allows you to generate several types of code, including SQL standard commands, classes, resource files, HTML 5 forms, Data managers, and more to add.
FreeStylerWs - Styles and skins for all popular sites in the web