PIE
Phonetically Intuitive English (PIE) is a free and open source Google Chrome browser extension that can automatically add diacritics to English words on Web pages to make their (American English) pronunciations crystal clear, based on a one-page, easy-to-learn scheme. It is intended for English-as-a-second-language (ESL) learners to learn correct pronunciation, and for children in English-speaking countries to learn to read.
Official website: https://sites.google.com/site/phoneticallyintuitiveenglish/
Reported by: PCWorld and many other media outlets
Wikipedia article: http://en.wikipedia.org/wiki/Phonetically_Intuitive_English