How do I programmatically get the active processes running in the background, CPU and RAM usage for iOS?
CPU usage was retrieved here: iOS - Get CPU usage from application
RAM usage seems to be addressed here: Available memory for iPhone OS app
Like EricS has pointed out in comments, there seems to be a way to get background tasks: Can we retrieve the applications currently running in iPhone and iPad and How to get information about free memory and running processes in an App Store approved app? (Yes, there is one!)