Top Open-Source Frameworks for
WordPress Plugin & Theme Developers

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Sage

A starter theme with a modern front-end development workflow.

Sage framework is used by 2 #themes on #WordPress.org with 10,449 downloads.
Koa
90
5.00
2,745

Koa wordpress theme, simple clean blog, a fully responsive lightweight theme. Compatible with all devices, contribute on GitHub.

Sonder
100
3.00
7,704

Sonder is a WordPress theme for personal website with minimal distraction for the user. With a responsive design using Twitter Bootstrap, Sonder theme gives a clean look for your website. For bug reporting and general theme feature requests, theme custom modifications and WordPress development contact the developer. For latest updates, check the developer site.