Dialo - Easily design and share your digital business card via QR Code and short link.
Readwise - Effortlessly rediscover and organize your Kindle highlights
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.
Clippings.io - Organize the notes you make on your Kindle
Linkcard - Create stunning digital business cards
Klib - Kindle & iBooks Highlights Manager