Type in accented letters, international characters or symbols into Firefox or Thunderbird, either simply by using a context menu (there being support for many languages), or quickly by keyboard macro (you can even define your own).

Adhiyan is a tool to convert and view TSCII/TUNE/TAB/TAM/DailyThanthi/Dinamani encoded Tamil content to UNICODE Tamil.

aFCA translates the text you select, right on the page. If the translation is obviously wrong, you can look for a better one in Google Dictionary. When you're done, middle-click and you're back on the first page. You can also …

1-Click Answers TM will save you even more time with AnswerTips that instantly deliver the information you are looking for. Just point at any word, hold the Alt key (Ctrl in Linux) and click. Upon letting go, an AnswerTip in the form of a pop-up...
For any questions or comments on the Answers add-on, please contact us: http://www.answers.com/main/contact_us.jsp

Allows typing into phonetic Russian, Ukrainian, Amharic, Arabic, Armenian, Hindi Davangari, Hebrew, Mongolian, greek... transforming translit into the choosen language...