This only works at DriveThruRPG.com. It doesn't work at RPGNow as far as I can tell, but if someone can replicate it there I'd be thrilled to hear about it. I prefer the color scheme at RPGNow ;)
Go to the DriveThruRPG / DriveThruStuff homepage. Below the featured product, you'll see a bunch of new products being shown and 3 tabs: Sample New Products, All New Products and New Since Last Visit. Sample New Products is the default. Best I can tell, it doesn't show any of the free products.
All New Products WILL show new "free" products, as will New Since Last Visit, but since the latter only shows what has been added since you last visit, not what you actually saw since your last visit (and we haven't been seeing any new "free" stuff)it probably won't help much at the moment.
All New Products is the tab you want. The FREE STUFF! graphic button is worthless at the moment. If and when they actually allow you to sort by release date the story may change for the better.
Succubus Sunday - Source
44 minutes ago