Mathquizily - Personalized math tests
Sum Fun - A fun number puzzle game for iPhone and iPad.
Mathway - Mathway is a freemium math solving app that helps you find the solutions to any math problem you can imagine.
NumberDrop - A uniquely challenging math puzzle game.
Delta: Math helper - With Delta: Math helper, quickly solve any math problem with an algorithm. Save time checking your homework or studying for a test, it’s free!
dworksheets.com - Free K-12 math worksheets to assist students, teachers, parents & tutors to practice, teach or prepare grade school assignments, classwork or homework questions & answers is available online in printable & downloadable format.