While most of the tech folks I know tend to favor Slack (RIP Glitch), we use Skype at work. It’s a fine (read: free) means of communication, but I like how scriptable Slack is, how much you can customize it. I created Zoltar as a way to get a little of that action in Skype.
There’s a lot of fun stuff at work, under the hood. I’m using RiTa.js to determine which words a user types are nouns and verbs. I then have a sprinkling of logic that checks for specific keywords (if you use ‘why’ in your message, I will add the word ‘because’ to Zoltar’s search).