The first game, available for free today, is Time Geeks, which is described as "a revolutionary seek and find game based on awesome Pixel Art graphics, retro style and a lot of fun."
The the application side, you can snag My Artists, which "enhances your music library with images, video, and text and makes discovering new music easy."
Keep a look at daily for some free games and apps. I definitely snagged a few last year. Also, keep in mind, you can simply add these to your Apple account while they are free and you'll own them regardless of what the price does in the future.
Also, mobile publisher Gameloft is running its own daily promotion through its Twitter account, which will include both free games and discounts.