This site, www.denizcemonduygu.com/philo/browse, is a fantastic way to learn more about philosophy. It lists out the major world philosophers, several of their key ideas, and how these ideas link to ideas of other philosophers.
It is a brilliant use of visualization software, too.
One thing: it can be hard to navigate at first. To make it easier, go to the Menu in the top right and then you can browse and search more easily.