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 free, user-generated online dictionary with extensive multilingual entries and examples, while GoldenDict is a versatile dictionary software that supports various formats and offers offline access. The key difference lies in Wiktionary's focus on collaborative content and examples, whereas GoldenDict emphasizes customization and format support.