https://breadcrumbsinteractive.com/two-unity-tricks-isometric-games/
http://compsci.ca/v3/viewtopic.php?t=25991
http://zetcode.com/tutorials/javagamestutorial/
http://crunchify.com/why-and-for-what-should-i-use-enum-java-enum-examples/
http://www.gametutorial.net - now at https://gametutorial.bozjatorium.com/; the original is on the web archive.
https://www3.ntu.edu.sg/home/ehchua/programming/java/J8d_Game_Framework.html
https://developers.google.com/blockly/
https://blockly-demo.appspot.com/static/demos/blockfactory/index.html
https://blockly-demo.appspot.com/static/demos/index.html
https://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Add_Mesh/Create_IsoCam
https://www.azul.com/ - Open-Source Java JDK with JavaFX for Windows,macOS,and Linux
http://www.siue.edu/_global/weblibrary/sounds/
http://amath.colorado.edu/pub/mac/programs/
https://www.g200kg.com/jp/software/ - possibly some of the best free VSTs out there
https://www.g200kg.com/jp/software/kerovee.html - absolutely the best free autotune/voice effect VST