Here are more paid iOS apps free for a limited time - Christmas edition1
Among the apps that are free for now, Songbot allows you to scan the globe looking for a radio station playing a particular song you want to hear at that moment. And Neonizer makes everything viewed through the camera appear to feature a Neon glow.
We never know when these apps will no longer be free. If you see an app that you want to install right at this moment, your best bet is to grab it now for free, before it is too late.