Wikipedia
Open Source
Wikipedia is the most popular community-created knowledge base.
Dictionary.com
Free
Dictionary.com is an online dictionary platform.
WordReference
Freemium
WordReference is an online translation dictionary for, among others, the language pairs English-French, English-Italian, English-Spanish, French-Spanish, Span…
Merriam-Webster
Free
Merriam-Webster is an online dictionary.
GoldenDict
Freemium
GoldenDict is a feature-rich dictionary lookup program, supporting multiple dictionary formats.
Everipedia
Free
Everipedia is the next generation online encyclopedia.
dict.cc
Free
dict.cc is a free, multilingual online dictionary. The site's database can also be downloaded and used offline.
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