From Joffrey Kriegel
This package is able to connect to a Slack channel, listen what you say in it and publish it in a ROS topic. It's also able to write on the Slack channel thanks to another ROS topic.
You can find the source code (in python) and the (little) documentation here : https://github.com/smart-robotics-team/slack-ros-pkg
I hope you will enjoy this package.