Does the country use open source software in electoral processes?

Belgium
Answer
Open source systems are currently being introduced or are in use
Source
Head of unit elections – IT specialist
FPS Home Affairs
See also:
http://www.elections.fgov.be/fileadmin/user_upload/Elections2014/FR/Electeurs/en_pratique/soft/avis_Codi.pdf
Comment
The applications used were developed by La soci?t? St?sud. The source code was made available for government review.