Is an offline dictionary. The supported languages are English, German, French, Italian, Hungarian and Spanish with translation from and to Czech. It downloads a dictionary on demand and stores it locally. Other than translation pairs it searches Google Translate and Wiktionary online. It makes it super simple and fast to search a lot of data.
Dryctionary is a concept work I've worked on a couple of weeks. It shows how to design a functional and visually appealing multi-language dictionary. The design approach was purely user centric and makes use of the dictionary effortless. On the top panel you'll find all the dictionaries, when grayed out, they're not available locally and have to be downloaded from the internet first. When you click the item the app will present you with a progress bar and starts downloading the dictionary selected. For the best performance you should let the app cache the dictionary in memory. To do so, click the dictionary icon again. Notice this happens automatically when the dictionary gets selected, and for the default dictionary on startup. The only thing you have to do when the app starts is enter your search query and press enter.
You can download a free version below, which will be ad supported sometime. So you do not need to purchase anytime soon. You can purchase the app to support the development or to remove the advertisements. The payment is bound to your email address so be sure to register your Dryctionary with the same email address you used when purchasing.