http://www.yoyogames.com/make

You can get a game maker there and it's free. It's easy to use which is good for people beginning to make games. The only problem is that the stuff you make can't be in .swf format (I think). That means you can't submit it to newgrounds. Anyway, it's great to use if you want to know how it feels to make games. If you like it then you can always buy a flash program later instead of spending money on one and then realize you suck at making games. Good luck. :)