Alternatives to Stylus
Applies custom CSS user styles to any website. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Stylus
Applies custom CSS user styles to any website.
Replacements
Listings that take over the same core job as Stylus.
Stylebot
Changes how a website looks without writing CSS.
Stylebot restyles sites by pointing and clicking without CSS knowledge and syncs through browser sync, but is simpler than Stylus for large or shared style sheets.
Also worth comparing
These listings name Stylus as their own alternative, so the relationship runs both ways.
Font Changer
Browser extension that lets you change the fonts used on any webpage.
Stylus applies custom CSS to any site under GPL-3.0, giving control well beyond fonts, but writing your own styles requires CSS knowledge.
Similar software
Related functionality, not a direct replacement.
Tampermonkey
Userscript manager for running custom scripts on websites.
Violentmonkey
Open-source userscript manager with cloud backup.
Dark Reader
Generates a dark theme for every website, on the fly.
VisBug
Point-and-click editing tools for any live web page.
Refined GitHub
Adds hundreds of small improvements to the GitHub interface.