7 Chrome extensions for learning English

I am interested in learning English, and also am an active user of Google Chrome. Therefore, I decided to collect in one material extensions for this browser, which I use or used in the learning process.
These services improve your writing, listening, pronunciation and vocabulary skills.
Linguix
The English grammar checker is also available as an extension for Chrome. After installing it, you just need to start writing something on the site with a field for entering text, and the program will begin to analyze it for errors. To fix them, you just need to click on the underlined word and select the proposed replacement. The service is able to correct errors in punctuation, grammar, and also indicates stylistic flaws. Constant references to popular shortcomings allow you to remember the correct spelling and at the same time communicate in English without errors.

Popular sites such as Twitter, Facebook, email services such as Gmail and a blog platform (Medium, WordPress) are supported.
Read & Write
One of the best extensions for language learners (not only English). Key features: the ability to translate text into speech and vice versa, built-in dictionaries with the meanings of words (including those transmitted using images), contextual recommendations.

Duolingo
The extension allows you to learn English words in various ways, including in a playful manner. After creating a profile in the system, you need to select the target language, set goals for the week, and begin to complete tasks. Each Duolingo course consists of modules that are grouped to form specific skills.

Pronunciation Checker
If you want to develop not only writing, reading and vocabulary skills, but also train your pronunciation, this extension will be useful. Using the voice recognition function, the system detects pronunciation errors.

Users can use their own audio files. Other languages besides English are also available.
ReadLang
The extension replaces the foreign word with an analogue from the native language - for this you need to click on this word. There is also the possibility of creating cards for memorizing words. Available for 40 languages.

Speakit
Another service for training listening comprehension. The user needs to select a section of text and the extension will convert it to speech. The system can work with more than 50 languages, and is very useful for learning English.

Google translate
As it turned out, the developers of Google Translate have created a convenient extension for Chrome. With it, you can easily translate words in a couple of clicks.

A few more alternatives:
- Vocabla - to expand vocabulary;
- Ginger - grammar checker;
- Duolingo Vocabulary Manager - an addition to the usual Duolingo from the user.
Complete the list in the comments!