HipChat.Net is a C# wrapper for the HipChat API that simplifies the formatting of URLs. The API responds to calls in XML or JSON, but HipChat.Net also offers native POCO representations.
Pusher has launched Pusher Chatkit, a new product that makes it possible for developers to quickly and easily add real-time chat capabilities to web and mobile apps. Chatkit features a Query API and iOS Swift SDK. Android (Kotlin) and JavaScript SDKs are available in preview.
Bots are a handy way to automate simple tasks that you might typically do on your own, such as updating calendar appointments. In this tutorial on Full Stack Python, Matt Makai explains how to build your first chatbot using the Slack API and Python to begin returning simple messages.