Your development team uses Github for issue tracking, but your customer support team uses Zendesk for ticket management. They're both awesome at what they do, but this means you have two sets of people (development and support) using two different tools. This communication burden is no bueno, as both groups miss out on valuable information. GitZen to the rescue!
GitZen is your one-stop dashboard for viewing and managing associations between Zendesk tickets (user-facing and probably linked to specific customers who requested the change) and Github Issues (developer-facing and generally technical). Simply add a custom field in Zendesk with the Github ticket number plus a `product_enhancement` tag, and you can quickly see the status of all tickets and their associated Github issue. Fundamentally, GitZen is a communication tool between your support team, your development team and your customers.
GitZen is designed to be quickly and cheaply (free) deployed on Heroku, so why not give it a spin?