We use YouTRACK to keep track of a number of things. One of these is upcoming changes/deployments.
We had a request from a user to have the ability to view upcoming changes on a calendar. As this isn't natively supported by YouTRACK, I put together a relatively simple piece of code to pull the issues out of the api and tied it to the excellent Fullcalendar jquery plugin. I think it works really nicely and gives the ability to click through to the underlying YouTRACK issue. The code is in ruby and it hosts well on Heroku.
If anyone has any interest - I'm happy to share :)