Readwise - Effortlessly rediscover and organize your Kindle highlights
Bionic Reading® - Did you know that your brain reads faster than your eye?
Newsletters to Kindle - Read your newsletters on your Kindle
Jiffy Reader - Jiffy Reader is a browser extension that allows you to read any website faster.
BookNotion - Easily save Kindle highlights in Notion for free
Kindle2Notion - Export your Kindle clippings to a Notion database