Dictionaries:
https://dictionary.cambridge.org/
https://www.oxfordlearnersdictionaries.com/
https://www.urbandictionary.com/
https://www.merriam-webster.com/
Web tools:
https://miro.com/
https://www.fotor.com/ru/
https://docs.google.com/document/u/0/?hl=ru
Course books:
English File. Upper-Intermediate. Students' book. 4th edition. 2019
Complete First. Student's book with answers. Second edition. 2015
Articles:
https://www.quillmarketing.com/10-grammar-rules-follow-writing-blog/
https://artofgrammar.com/grammar-and-blogging-crafting-engaging-content/