This article gives a general introduction to F-Droid and what you can use it for on your device.
What is F-Droid
F-Droid is an open-source app store for free Android applications where you have access to over 1200 ready to use applications.
What can you do with F-Droid
Through F-Droid you can either install the free application which are part of their repository or you can add your own private repository and upload your applications to run on your device.
For more information, visit the official website of F-Droid.
F-Droid and emteria.OS
Starting from emteria.OS version 0.5.3, it is included in all emteria distributions by default.
Read the tutorial on how to add a Private Repository or Private App Store on emteria.OS.