Vocabulary.com!

Duolingo is a free language-learning platform. It works by translating short sentences, selecting the right image for the word and filling an empty space in sentence. On website (in contrary to mobile apps) it provides clarifications on grammar.

Memrise is a free tool for learning vocabulary in multiple languages, using enhanced flashcards, powerful memory techniques, spaced repetition, and community sharing. Flashcards, lists, and mnemonics that are added by anyone are available to all (for study and in a "Memorable 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!

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 Dictionary extension supports 11 different languages.

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.

busuu.com is a free online community for learning languages. Connect for free with native speakers worldwide. Enhance your language learning with our online languages courses.

Lingvist is the fastest and most effective way to learn a new language. Learn words and phrases that are statistically relevant and used every day around the world. A smart algorithm keeps track of your progress

Vocabla is an app for building your English vocabulary.

Learn 33 languages in 500 bite-size lessons and 14 conversational modules. Be on your way to fluency by mastering the most essential 5000 words and phrases spoken by professional voice actors.

Babbel is multi-platform learning tool, available as a mobile app or on the web

Agenda Mahala is a great website to Learn English.On Agenda Mahala we have great English Courses, and both Level 1 and Level 2 are completely free.You also get an online notebook to keep the lesson appointments.

The fun and free way to look up definitions. THE graphical dictionary and visual thesaurus. We love words

This app can be used in self teaching of languages and as an addition to English lessons. With this course one can master grammar easily and learn to build sentences correctly. It will also help to avoid mistakes in oral speech and writing.For better understanding of the material and remembering rules, the self-study app is built as simple and visually clear schemes.Within each lesson one can take a theme test, and vice versa, within each test one can open a tip on a given unit. Besides, there is an opportunity to practice grammar, taking a complex test which saves the results.This training method is suitable for both adults and children.List of grammar topics:- Personal, object pronouns and possessive adjectives;- Articles;- Time and prepositions of time;- Prepositions of place;- Question words;- Comparative degree of adjectives;- Table of tenses (Simple, Continuous, Perfect and Perfect Continuous) with the use of constructions for building affirmative, negative and interrogative sentences;- Dictionary of irregular verbs in a learning and a self-check modes.The exercises are targeted for Elementary and Intermediate levels of knowledge.Another app of ours from the series "Learn and play. English" will help you to expand your vocabulary. »

TeamSpanish is a program that teaches people how to speak Spanish online through a video-based, web application. We are a family comprised of native Spanish speakers, teachers, and those who have learned Spanish as a second language. Our goal is to help people grow and connect by learning conversational Spanish using many of the same, fun techniques children use when learning how to speak their native languages. The heart of the company is truly to help those in need; which is why we donate 20% of our yearly profits to non-profit organizations. Now we need your help to spread the word! Check us out at https://teamspanish.com/about.php for more information! »