If you have a coding question, you can use stackoverflow with the tag 'errbot' and 'python'
Transactpro HipChat minion
Extensible HipChat bot for your organization.
HipChat API v2 portable client library for .NET
A simple plugin-enabled HipChat bot
HipKeeper restricted hipchat auto-registration form
Node.js wrapper for the HipChat API (v2)
Boundless' method for integrating Trello and HipChat - contributors wanted!