Chrome //
Extensions 
Chrome
Web store 
English vocabulary & Intellectual articles
Word of the Day, Article of the Day, Crossword Game, This day in history, Today's Holiday, Quote of the Day, Word Match Up
Word Discoverer: Expand your vocabulary
Highlights rare English dictionary words and idioms on web pages. Facilitates English language learning and expands your vocabulary.
Burning Vocabulary - Learn words from reading
Master vocabulary effortlessly with the full cycle process.
GRE Vocabulary Hub
Get popular GRE vocabularies at one place! quick review, interactive exercise, and offline flash card.
Vocabulary Study Online
English vocabulary study online: dozens of proven word lists, tools for exercise, review and test.
Vocabulary test
Simple vocabulary test to learn English, Portuguese, Russian, Spanish, German, French, Italian, Polish, Czech and Slovak
5000 TOEFL Vocabulary List
A proven TOEFL vocabulary, quickly learn and review words, show definitions on demand, match and spell words in interactive way.
EachWord Translator - expand your vocabulary
Add new words to the dictionary and they will be occasionally shown as cards.
PTE Exam Vocabulary
Online resource to prepare PTE exam: word lists, exercise apps, tips, and experiences.
IELTS Vocabulary Test
IELTS Vocabulary Test is based 1200+ basic IELTS words. Each test sheet has 12 questions that are produced dynamically.
Print PDF RTF Vocabulary
Create customized Vocabulary in PDF or RTF based on various word lists for IELTS, TOEFL, PTE, SAT, and etc.
Vocabulary in Context
Save vocabulary in its context and review them later. A highly efficient tool to improve vocabulary when learning foreign language.
ACT Test Vocabulary
Online resource to prepare ACT exam: word lists, exercise apps, tips, and experiences.
Vocabulary Flash Card
This extention will create your vocabulary flash card automatically based on your accessing URLs.
Vocabulary.com
With its uniquely effective word learning system, Vocabulary.com helps students learn and master words.