There is no best, only better ~

MDBG reader , which has online translation. The word dictionary of this website is based on CC-CEDICT. CC-CEDICT is a continuation of the CEDICT project started by Paul Denisowski in 1997 with the aim to provide a complete downloadable Chinese to English dictionary with pronunciation in pinyin for the Chinese characters. This website allows you to easily add new entries or correct existing entries in CC-CEDICT. Submitted entries will be checked and processed frequently and released for download in CEDICT format on this page. Go to : http://www.mdbg.net/chindict/chindict.php or http://www.mdbg.net/chindict/chindict.php?page=cedict

www.youdao.com

http://www.mdbg.net/chindict/chindict.php http://translate.google.com/#zh-CN|en| http://popupchinese.com/chinese/dictionary ...and if you need to write a character: http://www.chinese-tools.com/tools/mouse.html

I like to use zhongwen.com