Whereas Babylon and ABBYY Lingvo dictionary software support only one (native) format, and Stardict supports only two formats, GoldenDict offers support for many different formats.
There are many options, that may satisfy anyone, but the app itself (and those great Lingvo's own dictionaries) is not free as it's price ranges from $39.99-$129.99.
ABBYY Lingvo also offers mobile versions of it's dictionaries for Android and iOS, though they will need to be purchased separately from their desktop versions.
Pretty unique and nice feature: it includes Currency Converter, International Dialing Codes, International Time Zone Converter, Weights & Measures Converter and more.
The online translation service offered by Lingoes integrates the most advanced text translation engines in the world, including Systran, Promt, Cross, Yahoo, Google and Altavista, etc, which makes text translation unbelievably easy. You can freely choose these engines for your translation and compare the different results generated by different engines to help you understand the texts in languages which you are not familiar with.