Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

WebSatchel - Copy and save web pages to your own personal archive

Wordd - Quickly look up vocabulary, abbreviations, acronyms, slang

Keep Everything - Light & Fast Web Archiver for iOS, OS X.

Word of The Hour - Easily expand your vocabulary with a new word, every hour 🕖

Instapaper - Instapaper is a simple tool to save web pages for reading later.