GoldenDict is an open-source dictionary program for PC computers that gives translations of words and phrases for different languages. It allows use of several popular dictionary file formats simultaneously.
- - GoldenDict is the most popular Windows, Android, Mac & Linux alternative to Ninjawords.
- - GoldenDict is the most popular Open Source & free alternative to Ninjawords.
Wiktionary is a multilingual, web-based project to create a free content dictionary, available in 158 languages. Unlike standard dictionaries, it is written collaboratively by volunteers, dubbed "Wiktionarians", using wiki software, allowing articles to be changed by...
- - Wiktionary is the most popular Web-based alternative to Ninjawords.
WordReference is a free online Oxford dictionaries for Spanish, French, Italian, German and more.
- - WordReference is the most popular iPhone, iPad & Android Tablet alternative to Ninjawords.
Free online dictionary, thesaurus, spanish-english and medical dictionaries, audio pronunciations, Word of the Day, word games, and many more high-quality Merriam-Webster language resources.
Google's dictionary extension on Google Chrome. With it, you can double-click any word to view its definition in a small pop-up bubble, or search the complete definition of any word or phrase using the address bar dictionary.
The free Dictionary.com app delivers content from Dictionary.com and Thesaurus.com, including nearly a million words and definitions and 90,000 synonyms and antonyms. No internet required!
Glosbe is a platform providing free dictionaries with in-context translations (translated sentences - the so-called translation memory). You will find here:
Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia encyclopedia, Wikipedia...
Artha is a handy thesaurus based on WordNet with distinct features like global hotkey look-up, passive desktop notifications, regular expression based search, etc.. Artha may be used as a free open-source replacement to the proprietary WordWeb Pro.
Your Mac also comes with a versatile Dictionary application. It also includes to other reference libraries such as thesaurus, Apple glossary, and Wikipedia. With it, you can find definitions, learn of the word's origin, find synonyms and antonyms, or get encyclopedic...
Thesaurus.com is the world’s largest and most trusted free online thesaurus brought to you by Dictionary.com. For over 20 years, Thesaurus.com has been helping millions of people improve their mastery of the English language and find the precise word with over 3 million synonyms...
StarDict is a Cross-Platform and international dictionary Software. It has powerful features such as "Glob-style pattern matching", "Scan selection word," "Fuzzy query," etc. Stardict Version3.
The project seems to be no longer updated. Last version, 3.0.6, released in January 2015, but it can be still downloaded from SourceForge.