http://jlptbootcamp.com/2013/05/jlpt-n5-online-practice-test/ - Limited questions but useful
http://iteslj.org/v/j/ - No need to register and login
http://www.jlpt-practice.com/studyroom/PracticeTest - Need to register and has sample to test to take
http://www.nihongoden.com/2009/02/past-jlpt-level-2-exam.html - Wonderful site