Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
IBM Watson Assistant - Watson Assistant is an AI assistant for business.
Drift - A messaging app that helps you grow your business.
Zendesk Answer Bot - Chatbots
C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation
D (Programming Language) - D is a language with C-like syntax and static typing.