Databases that have smart phone app:
Ebscohost - at the bottom of the search page on any Ebsco Database is link for instructions on setting up the iphone or the Android app. Whichever Ebsco Database that your in when you sign up will the database searched by your app. For example if you're searching ERIC when you sign up you will be searching ERIC on your smartphone.
Science Direct - Instructions for using Science Direct on your mobile device can be found here. Science Direct has apps for Android, Blackberry, ipad and iphone.
ArtStor - Instructions for accessing Artstor on your mobile can be found here. ArtStor Mobile has an app for iphone and can be accessed from a browser.
Naxos Music Library - Naxos Music Library has an iphone app and a Droid app available.
American Chemical Society (ACS) - Click here for information on the ACS mobile apps for iphone and Android.