* Daum Equation Editor (Å©·ÒÈ®Àå) https://chrome.google.com/webstore/detail/dinfmiceliiomokeofbocegmacmagjhe

 * http://www.numberempire.com/texequationeditor/equationeditor.php
 * http://sites.hamline.edu/~arundquist/equationeditor/

 * Google Knol

 * Texify http://www.texify.com/links.php