Hey there, hi there!
Quite a while ago i worked for a company called PocketGuide Inc. and created a tour of Tartu as a smartphone application. Now it is ready and waits for being downloaded! The users can turn their smartphones into a personal tour guide and enjoy the interesting sightseeings it will show you. I decided i will share it here on my blog as well in case any of my readers is planning to visit Tartu in Estonia or knows a fellow who is going on that trip. Go and have a look : http://pocketguideapp.com/en/tartu !
Cheers, have a beautiful day!