CALCONIC_ - Build & add interactive calculators to your website! Choose from more than 50 premade calculators or build your own from scratch. No coding required. Free plan available. Zapier Integration. Publish Anywhere.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
ConvertCalculator - Create powerful, beautiful Calculator forms
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
uCalc - uCalc is a universal builder of forms and calculators.
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.