Development-Tools.md

+The freeware version of Modelsim can be downloaded from:
+* https://www.altera.com/products/design-software/model---simulation/modelsim-altera-software.html
+
+The free version of Quartus for synthesis is available at:
+* https://www.altera.com/downloads/download-center.html
+
+The documenation is written in Lyx which is available at:
+* https://www.lyx.org/Download
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