This site contains a simple collection of Java and Javascript Games In many of the Javascript Games you can play and save the scores.
The Games created by me are Crazyball & Eatit, both written in javascript language I have also created a CHESS game in PHP, you can play against a friend.
No software download is needed, it is free and the game are automatically saved.
You only need to register yourself and find a friend to play aginst.

I have also created a game which is a web based clone of the famous risk board game.
It is called Dominate the World - Browser Game and is based on the italian rules.