DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
GPS Status & Toolbox - Display your GPS and sensor data: Shows the position, number and signal strength of GPS satellites.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Trail Sense - An Android app which uses your phone's sensors to assist with wilderness treks or survival situations.
TiddlyWiki - a non-linear personal web notebook
HuntStand - HuntStand is an app featured with hunting and land-management that helps you to access the nationwide database of public and private landowners to view property lines, owner names, and WMA coverage comprehensively.