The Google Translate tool allows you to type in text or submit a website URL or include a document for translation. It is renowned as being one of the best free online translation tools including translations from over 80 languages.
The Microsoft/Bing translator tool can convert text from 52 different languages. This translator has an auto-detect feature that will try and interpret what language the text is in then translate into the language of your choice.
This translator service has some ads on the page, but it offers a lot more options then the Google and Bing translators, including a dictionary other resources that make it more versatile for different needs.