Zhongwen: Chinese-English Dictionary is a popular Chrome extension that allows users to easily translate Chinese words and expressions while reading Chinese websites. It supports both traditional and simplified characters, and displays the English translation as well as the Pinyin romanization with color coding for tones. The extension also includes links to grammar and usage notes, and supports adding words to Skritter for studying. It has useful features such as a built-in word list, the ability to create Anki flashcards, and the ability to look up example sentences.