Need a good app marketing polices for indie developer.

Hello, I am a newbie iPad game developer. I work in a small iPad game development group. Most of our group members are also newbie just like me. Though we already develop some game for iPad and its free in iTunes store. But none of our game is not that popular and the number of download is not that good. We don't launch any marketing campaign for our product because our financial background is not very healthy. So we urge some help from this community. We really need some help. What will be the best marketing policies for us. Any opinion, suggestion and participation is welcome. Please help us out.