Note: While it is tempting to use automated translation on important documents, if anything of legal weight is riding on your understanding of a translated document, hire a professional translator. Automated translations will also generally not be accepted for business purposes and other uses.
Google Translate - Greek to EnglishMy personal favorite is Google Translate. It works two ways - you can cut and paste Greek material into the translation window, or you can simply copy the URL over and Google will create a translated page. For most purposes, this is the quickest and easiest way to go.
How to Use Google Translate for Greek to English Translations
Depending on the length of the page, not everything may be translated. In this case, simply copy the remaining text directly into the "translate" box and click "translate".
Google also gives you an option to automatically translate websites that are in Greek to English.
BabelfishOne of the original automated translation programs, Babelfish is still worth using. It's part of Yahoo now and uses a similar interface to the Google Translate above. They have a separate box for the URL to translate a webpage.
GreektionaryI love the Greektionary site and it has automated translation for Greek words and shorter passages. They also offer a daily newsletter with three Greek words to learn, along with a sentence using the words. All are accompanied by audio, and on the site, you can select either a normal speed of audio or a slowed-down one better for beginners.