iMonitor is a System Information Monitor. It shows Memory/Storage/CPU/Data real-time usage which will help you know you system state better. Also, it can be placed in Today as a widget in iOS9.Note: Process list is not available on iOS 9.

iMonitor - Monitor Network & Usage alternatives

Traffic Monitor - Mobile Speed Test & Usage Widget

Wdgts - A Collection of Notification Center & Watch Widgets

Data Widget

Usage Widget

Vidgets