Google Drive - Access and sync your files anywhere
GPS Status & Toolbox - Display your GPS and sensor data: Shows the position, number and signal strength of GPS satellites.
Dropbox - Online Sync and File Sharing
iHunter Alberta - iHunter Alberta is an amazing mobile application offered by Inside Outside Studio Inc.
ShareFile - Secure file sharing and sync
Trail Sense - An Android app which uses your phone's sensors to assist with wilderness treks or survival situations.