The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From jalada GmbH:
Struggling With Vocabulary? Call the Alchemist!Language Alchemist is your ultimate assistant to translate foreign language texts. Integrated in practically any Mac application such as Safari you get the power to investigate unknown words without large detours. As the result you can still better and still faster understand various sources of information, e.g. manuals, online help and Web pages.*** Look up words with just One-Click ***There is no need for complicated additional typing or Copy&Paste operations. You can start a translation with just one mouse-click while you are working in other applications or documents. *** Embedded multilingual dictionary ***The revised edition of our multilingual dictionary with 26 languages included (= 400 individual dictionaries) - provides you with an extensive vocabulary, which can be extended smoothly at any time. *** Extending the vocabulary has never been so easy ***Design your own information source with Lexis Builder. The Builder assists you descriptive during the whole build process, from selecting the data source to installing your extension. Please follow simply the onscreen instructions.*****Currently the embedded dictionary includes the following languages:Major Languages: English, Dutch, Spanish, German, Portuguese, Esperanto, French, Danish, Czech, Russian, Italian, SwedishAdditional Languages: Afrikaans, Hungarian, Faeroese, Polish, Finnish, Thai, Norwegian, Turkish, Icelandic, Greek, Romanian, Albanian, Swahili, Latin