A small Slack bot I wrote in around an hour. Uses the Susi API on which I'm currently working on for another project, and the RTM API for using with Slack. I'm also working on a Node version for the same.
More about Susi: http://asksusi.com
On your virtualenv, install the requirements using pip install -r requirements.txt. Set up a bot on Slack and add the token in the config file, and set the botname in asksusi.py.
Run the app using python asksusi.py.
TODO: Write this in Flask and deploy it.