Citymapper - The ultimate transport app - iPhone / Android / Web.
Luna Display - Hardware that turns the iPad into a wireless second display
Tickey - Buy tickets for public transport with your smartphone
Duet Display - With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.
Embark - A public transport app that works everywhere
Mountie - Mount a second screen (iPad/iPhone/tablet) to your MacBook