Downloads: The best free apps for your gaming PC

Update: We've added new kid on the block Raptr to our list. It's one you should check out — especially if you're rocking a modest PC with integrated graphics.Gaming on the PC is still a thriving business, despite the success of consoles such as the Playstation 4 and Xbox One. However, the 3D graphics used in the latest games can put a real strain on your PC.Fortunately, we've got some great free apps that can help you fine-tune your PC's gaming performance. We've also found some useful apps t