on099.com

I'm using this tiny app, very user friendly and portable :

http://tp.lc.ehu.es/jma/win32/dirco.html" onclick="window.open(this.href);return false;

如果就咁抄 file 可以用
http://sourceforge.net/projects/freefilesync/" onclick="window.open(this.href);return false;

要 encrypt 可以用
http://www.duplicati.com/" onclick="window.open(this.href);return false;