I want a dictionary or translator that uses or is similar to to Google translation for translating from English to Arabic, vice-versa or between any languages, so, what is the best one? It would be better if this program has an indicator or launcher quick-list.
This would be my recommendation.
Google Translate Desktop
You can install Google Translate Desktop, it's written in Java and because of that runs everywhere, it also uses the Google Translator API.
Can be dowloaded here: Google Code - Google Translate Desktop (Last Release: July 28 2012).