Readwise - Effortlessly rediscover and organize your Kindle highlights
Dialo - Easily design and share your digital business card via QR Code and short link.
Clippings.io - Organize the notes you make on your Kindle
KADO - #1 Digital business card and contact managerKADO helps you to better connect with your clients, exchange business cards, manage contacts, record notes and interactions on prospects to stay on top of your game.
Klib - Kindle & iBooks Highlights Manager
Linkcard - Create stunning digital business cards