Kindle2Notion - Export your Kindle clippings to a Notion database
Goodreads - See what your friends are reading.
Hazel - Lighweight update server for Electron apps
LibraryThing - A home for your books.
Readwise - Effortlessly rediscover and organize your Kindle highlights
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes