I've just launched my first app, How Long Left. It's a 100% free app that counts down the minutes left of your current calendar event in your menu bar. It would be cool if you checked it out if that sounds interesting to you 
https://itunes.apple.com/us/app/how-long-left/id1388832966?ls=1&mt=12
https://itunes.apple.com/us/app/how-long-left/id1388832966?ls=1&mt=12