Transmiti – Google Translator Built Into Microsoft Windows
http://www.transmiti.org/en/index.html

Translate selected text or entire documents in no time with the Windows key! Features include: a) Totally free! No Registration required; b) No installation needed; c) No administrator- or power-user rights needed; d) All languages are supported, to which the Google Translator is capable of; e) Optionally, the selected text will be replaced directly with the translation; and f) The user-interface supports 52 languages. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.