Good apps to take ACTUAL pictures with?

I have an iPhone 4, & I'm running out if room. Before I do I want to know if there are any apps to let you take ACTUAL pictures & they save to your camera roll, like basically another camera application but to take PHOTOS? My friend has one, & I want to know it but she won't tell me. Anything will help

The stock Camera app does that just fine. Why would you need another app to do the same thing?