Gratis apper:

• Duolingo
• Lær språk med Memrise
• learning english Grammar (British Council, UK ed.)
• Johnny Grammar's Word Challenge (British Council)
• Fun Easy Learn English

Podcaster - Learn English from the go!:

• LearnEnglish Podcasts (British Council) - app

Speaking:

• Oxford Online English - Free Spoken English Lessons

Writing:

• Oxford Online English - Free English Writing Lessons

Pronunciation:

• Oxford Online English - Free English Pronunciation Lessons

Grammar:

• English Grammar Book - app 
• Free English Grammar Lessons and Tests 

Vocabulary:

• Oxford Online English - Free English Listening Lessons

Basic English for beginners - Free online course:

• Basic English for beginners - app
• Online course - Basic English 1 (Join with limited access free)

Free online language course: 

• ESOL Courses - free English lessons online