Monolingual dictionaries and thesaurus:
https://en.oxforddictionaries.com/
https://www.merriam-webster.com/
Grammar, pronunciation, writing and more:
http://www.bbc.co.uk/learningenglish
Newspapers:
The Local: Sweden’s News in English
https://www.huffingtonpost.com/uk
Things to watch and read:
Things to listen to: