Calculator is written with Java and is now under active development. Download Calculator(as a zip).
Calculator v.1 Copyright (c) 2017 JJ Posti <techtimejourney.net> This program comes with ABSOLUTELY NO WARRANTY; for details see: http://www.gnu.org/copyleft/gpl.html. This is free software, and you are welcome to redistribute it under GPL Version 2, June 1991″)