密碼加密相關
http://www.cmd5.com/
http://www.hashkiller.co.uk/
http://www.sha1-online.com/
http://md5jiami.51240.com/
http://tw.freemd5.com/
http://tool.chinaz.com/tools/md5.aspx
http://www.xmd5.org/Encrypt_cn.htm
http://yanghao.org/tools/md5.php
網頁加密相關
http://www.ifreesite.com/url/
http://www.slime.com.tw/nctu/teach/code.htm