Arcade Booster is a free/paid professional and easy to handle script for web and mobile users. Add iOS, Android, Unity, HTML5 and Flash games with ease.
Offers AV Arcade Pro and also offers a free arcade script.
Free Arcade Script
A totally free arcade script with many great features. Has a support forum for questions.
onArcade is a PHP and MySQL powered arcade script with many great features. Setting up your own arcade site with onArcade script is easy and takes less than 5 minutes.
MyArcadePlugin is a powerful WordPress arcade plugin.