Perfecting your English through a “corpus of Youtube”: Youglish Youglish consists of more than 30 million Youtube tracks with which you can listen to, imitate, and improve your pronunciation. Aparte from English language (different accents can be selected!), it supports other languages, such as French, Spanish, German, Italian, Portuguese. Advance search (such as part-of-speech, gender, topic search) is also available.
Enhancing your English writing skill with a “concordancer-like” app: Writefull Writefull is a google-based writing assistant app that provides you with many ‘real’ sentences from Google source1, so that you can check your sentences against them.