Dialo - Easily design and share your digital business card via QR Code and short link.
Knowee - Don't print your cards - Impress your contacts.
wCard.io - A better way to present yourself & get more business connects
Sansan - Sansan provides a internal contact sharing service for companies.
Swapflo - Digital business cards for Apple & Google Wallet
Sidekick by Hubspot - Customer insight integrated with your email tools.