hubot-keepalive 
A script that has Hubot periodically message itself so connections (namely Slack) don't time out.
See src/keepalive.coffee for full documentation.
Installation
In hubot project repo, add hubot-keepalive and cron to your packages.json, npm install,
then add hubot-keepalive to your external-scripts.json.
Supported configuration
Currently this script is only tested on Slack as the purpose of this script is to work around a bug where the slack adapter will drop connections and then not reconnect. A proper fix is in the works here. Or, there's also a bit of background in this issue.