Quantum Star SE is a browser-based space strategy and trading game played across a mapped galaxy against other players. Utilizing mining, trading, research, and production through easy-to-use tools, QS enables both broad micro-management of resources or more "aggregated" methods. Players compete, combat enemy fleets, and manage planets to become the "last man standing". No user downloads are required, and the game is free to host or play.
Nethack Records is an on-demand statistics generator for Nethack that is meant to be run on a Web server. It has several types of statistics, ranging from character info to daily and weekly stats. It is implemented with a modern template system, and is very customizable. One can sort by most field-types, such as character class or gender. The code is separated from the XHTML by means of HTML::Template. CSS is utilized to its fullest extent, allowing you to make it look however you like, without knowing Perl.
Marauroa is a multiplayer online game framework server. It uses a multithreaded server architecture with a TCP oriented network protocol, a MySQL based persistence engine, and a flexible game system. The game system is totally expandable and modifiable by game developers and is able to run Python scripts defining the game's rules. Marauroa is based on a design philosophy called Action/Perception. Marauroa is totally game agnostic and makes very little assumptions about what are you trying to do, allowing a great freedom to create any game type.