What types of open source systems have been considered or used?

Nigeria
Answer
Ubuntu, a Linux Operating System used for voter identification and external storage devices
Source
The OpenVR software runs on Ubuntu - a Linux Operating System - and supports a variety of fingerprint scanners, external storage devices, printers and web-cameras. It also features an in-built Automatic Fingerprint Identification System (AFIS) to reject multiple registration attempts. It comes as a bundled solution that works right out of the box, without any configuration required on most hardware.
OpenVR is a Linux-based solution originally designed and developed for the Independent National Electoral Commission (Nigeria) as an Open Source project. Developed for Africa by Nigerians, OpenVR design criteria include ease of use, an intuitive user interface and robustness in the field.
Comment
The OpenVR software runs on Ubuntu - a Linux Operating System - and supports a variety of fingerprint scanners, external storage devices, printers and web-cameras. It also features an in-built Automatic Fingerprint Identification System (AFIS) to reject multiple registration attempts. It comes as a bundled solution that works right out of the box, without any configuration required on most hardware.