... free and without software installation in a browser:
Examples:
- SimCity: http://www.simcity.com/
- 10 browser games 4 learning web development & programming:
http://tutorialzine.com/2016/05/10-fun-browser-games-for-learning-web-development/ - Serious Educational Games (best of):
http://www.onlinecolleges.net/50-great-sites-for-serious-educational-games/
Coding & Programming:
- Engaging game for learning programming: https://codecombat.com/
- Learn to code interactively: https://www.codecademy.com/
- Tynker - coding 4 kids: https://www.tynker.com/
- Scratch: https://scratch.mit.edu/
- Coding Game: https://www.codingame.com/start