here is the link to OLBG which is simply the best site on the web imho
it's completely free and pays out over £3k per month in prizes in the tipping competitions - you can play with virtual money and test your skills or systems or compete with friends, whatever you want
the forum is superbly knowledgeable and helpful and there are plenty of free challenges to join - in football, horse racing, golf, american football and so on
just click through and have a look, join up and have fun - remember, it's free!
just click on this link > OLBG