Web services
Z WikiKnihovna
Google API http://code.google.com/more/#label=APIs&product=android
Google Books in LibraryThing http://www.librarything.com/blog/2008/03/google-books-in-librarything.php
LibaryThing APIs http://www.librarything.com/thingology/labels/apis.php
LibraryThing JSON API Test http://www.librarything.com/test_JSON.php