Olivia
Your new best friend powered by an artificial neural network
... is saved in your client. Olivia is organized in modules to facilitate the addition of new capabilities. These modules can be written in Go to execute multiple tasks. The project is entirely open-source from the website to the backend. Thus you can build your own chatbot and contribute to Olivia. You can directly add the PWA to your home screen from the website, and you won't remember that it is a website running behind this native-like app.