I've done a fair amount of both public speaking and sales presentations to pitch products.
Art & Science of chatbots
Ways to apply a chatbot to each step of the user journey
WeChat Dark patterns
Being involved with 'bots and growth marketing, and the China market I'm familiar with a number of shady growth hacking techniques.
Grammar of Chat Applications
Thinking creatively about how to create engaging and fun "chat applications"
GaChat - Graphical Chat Framework
This was from a presentation back in 2015, before Facebook messenger had an API. I was trying to find other developers to create a standard for widgets in Chat applications. A visual chat markup language, VCML. From basic widgets to embeddable games. This took awhile but eventually morphed into our MiniBot Framework. It's a marathon!