BaseMap - BaseMap is the only outdoor app you will ever need. Turn your phone into a GPS, map your outdoor adventures, and interact with the BaseMap community.
Orgzly - Outliner for notes, tasks and to-dos
VisualGPSView - VisualGPSView incorporates many advanced features found in professional programs.
MemPad - MemPad is a plain text outliner and note taking program with a structured index.
Prestavi - Prestavi is the easiest way for your customers, employees and vendors to follow your business processes in a step by step format.
Workflowy - A better way to organize your mind.