PTC Windchill - Windchill offers breakthrough Product Lifecycle Management (PLM) capabilities, unleashing more data to more stakeholders throughout your organization through a single source of truth for product data and processes.
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Propel - Propel is a customer-centric PLM software built on Salesforce App Cloud platform.
WhenWorks - Mobile appointment scheduling
SAP PLM - SAP Product Lifecycle Management (SAP PLM) application provides you with a 360-degree-support for all product-related processes - from the first product idea, through manufacturing to product service.
Inspora - virtual chat-stylist for fashion advice.