TransOver от artemave

Translate word (or text selection) from any language to the language of your choice by pointing or clicking at it.

Also you can (enable in options):
- text-to-speech
- reverse translate: from your own language to the language of your choice
- type and translate in a popup
- copy translation to clipboard

Chrome version: https://chrome.google.com/webstore/detail/transover/aggiiclaiamajehmlfpkjmlbadmkledi