Botometer for Twitter - Intelligence tool to check if a Twitter account is a bot
Readwise - Effortlessly rediscover and organize your Kindle highlights
Twitter Bots - Make smart Twitter bots without coding
Clippings.io - Organize the notes you make on your Kindle
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
Klib - Kindle & iBooks Highlights Manager