八数码游戏 启发式搜索:http://blog.csdn.net/q345852047/article/details/6626684
creative commons: http://creativecommons.org/choose/
那些最好的* - PHP篇:http://avnpc.com/pages/best-wheels-for-php
简明 Python 教程:http://sebug.net/paper/python/
Online JavaScript beautifier:http://jsbeautifier.org/