Google PDF Viewer (Lightest utility) by Google
Magnifier with Flash Light by APP2U
Contact Editor Free (For lengthy contact notes) by DMFS GMBH
Call Recorder (Lightest utility) by LoveKara
FiiNote (Advanced Notes Taking with pictures) by FLYABLE
Calls Blacklist (Call and text blocker) by Vlad Lee
Audio Recorder by Sony Mobile Communications
LibriVOX (free audio books) by BookDesign
Flash Light by Happy Hollow Inc.
Startup Manager by Daniel Ch.
Scroll Capture for Web by Evening Labs.
Battery by MacroPinch. (just in case your phone has no battery status indicator)