The Humble Store has been on a roll recently with decent sales and some solid free games.
For the next day and so, you can head to the Humble Store to grab your own free copy of indie horror game Layers of Fear, and its full soundtrack. You get a Steam key, so just head to the Layers of Fear page on the store, and add it to your cart.
If you're in the market for more indie hits, the Humble Store is also hosting a limited-time Indie Mega Week sale, with discounts on Cuphead, Hellblade: Senua's Sacrifice, Stardew Valley, Slime Rancher, Heat Signature, Undertale, Owlboy and many others.
Check out the entire Indie Mega Week sale at the link. As always, you also get a 10% discount on top if you are a Humble Monthly subscriber. The sale is live until Monday.