Useful apps for participants having Android phones*:
Ljubljana Guide:
https://play.google.com/store/apps/details?id=com.hiteshi.ljubljana
Ljubljana Traveller Guide:
https://play.google.com/store/apps/details?id=com.travelerpocketguide.TravelerPocketGuide.Ljubljana
Ljubljana local’s tips:
https://play.google.com/store/apps/details?id=com.spottedbylocals.Ljubljana
Ljubljana Map and Walks:
https://play.google.com/store/apps/details?id=com.gpsmycity.android.u195
Ljubljana Bikes:
https://play.google.com/store/apps/details?id=com.greengrowapps.ljubljanaBikes
Ljubljana Airport:
https://play.google.com/store/apps/details?id=si.ljuairport
Ljubljana Taxi (in Slovene, but there are telephone numbers):
https://play.google.com/store/apps/details?id=si.hafnar.ljubljana_taxi
Slovenia Guide by Triposo:
https://play.google.com/store/apps/details?id=com.triposo.droidguide.slovenia
For iPhone users*:
Bicikelj Ljubljana:
https://itunes.apple.com/us/app/bicikelj/id442927900?mt=8
Ljubljana Airport 1.0:
https://itunes.apple.com/us/app/ljubljana-airport/id641468146?mt=8
Ljubljana Map and Walks:
https://itunes.apple.com/si/app/ljubljana-map-and-walks/id403511437?mt=8
LPP bus Ljubljana public transit 1.8.1:
https://itunes.apple.com/si/app/lppbus-ljubljana-public-transit/id480115283?mt=8
Slovenia Travelpedia 5.0 (not sure if this is free app):
http://appfinder.lisisoft.com/app/slovenia-travelpedia.html
Some more apps:
http://appfinder.lisisoft.com/ipad-iphone-apps/ljubljana.html
* Please, check if applications require data transfer. Note that you can use one hour per day free internet (cumulatively) by connecting to WiFreeLjubljana (http://www.wifreeljubljana.si/en)