Onesheet CRM - The Simple CRM for Google Sheets
Yelp Reservations - Reservations taken online, front-of-house management, and integration with Yelp.
NoWait - Restaurant Reservations
simpleERB - An Electronic Reservation Book for restaurants.
Sales CRM by Cooby - Build mobile sales engines for WhatsApp without spreadsheets
WhatsApp Business - Communicate more efficiently with your customers