IBM Watson is a brand that includes a set of products and services, made famous by its Jeopardy prowess. Watson includes a chatbot platform and conversational API.
Through Bot Libre, you can now send and receive messages on Skype with your own bot. This "How To" will give you a step by step process to connect your bot with Skype.
You can also watch this "how to" on Youtube here
Step 1 - Create a Bot