d13 is a free browser game engine that allows you to build your own multiplayer online strategy game. suited for tick based empire building games that follow the 4X concept: eXplore, eXpand, eXploit and eXterminate. Despite its oldschool look and feel, d13 comes as a fully OOP, MVC web-application that features a responsive design as well as great flexibility. You can easily add troops, buildings and technologies and create templates and skins for the project as well.
Live Demo:...
http://templates.services.openoffice.org/en/template/lulucom-cd-dvd-label
(another very old app, server side code was lost)
SpaceNOutX is a flash/php based game that (will) let players carve out their own piece of a a virtual universe. Creating a new user and the map system should work. Load the map then zoom waaaaay out to see probably the coolest thing about the game so far. This version is being compiled from several previous versions from Android, BASIC, and ActionScript.