These websites and other guilds help people who are new to learning Chinese have a basic understanding of the language, or if someone considers learning Mandarin as a language in the future. Post a link if you also know of other places to learn Mandarin.

http://www.gaiaonline.com/guilds-home/xue-zhong-academy-learn-chinese-online/g.352807/

http://chinese.yabla.com/vocabulary.php

http://www.ctcfl.ox.ac.uk/Pinyin_Notes.htm