WordPress Theme Search - What WordPress Theme Is That?
Readable WordPress Theme - The first Medium.com like WP theme with great readability
Blocksy - A lightningfast, innovative and supercharged WordPress theme
GPLDL - 1066 GPL-licensed WordPress themes & plugins for free
LyrWP - WordPress themes / plugins / services curated.
Elementor - Elementor is a front-end drag & drop page builder for WordPress.