Wiktionary is a multilingual, web-based project to create a free content dictionary of all words in all languages. Developed by Wikimedia Foundation
License: Open Source
Wiktionary is a collaborative dictionary offering comprehensive language resources with a focus on user-generated content, while dict.cc specializes in cross-language translations and is more user-friendly with mobile support. Wiktionary is better for in-depth language study, while dict.cc is ideal for quick translations.