AfterShip - AfterShip is the shipment tracking API for ecommerce businesses and marketplaces.
Mailtrack.io - The best email tracking solution I've found. Free
Cabubble - Taxi and minicab quotes for London, Birmingham, Manchester and throughout the UK. Book a licensed taxi or minicab online via website or mobile app.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
Digital Waybill - Digital Waybill is an online delivery ordering courier software solution that provides features & functions to help manage online ordering, GPS tracking and more.
Inbox Grader by Freshworks - Free metrics 📈 for your business and team email ✉️