English lessons are available online. Sites such as usingenglish.com contain references, tests, explanations for idioms and slang, as well as discussion forums.
Students can practice their English in online chat rooms. Englishclub.com and similar sites provide such chat rooms for English learners seeking to improve their skills.
English learners can meet native speakers through languageexchange.org. Facebook and other social networking sites may be useful as well. English learners can make themselves available for chat with native speakers through Skype and other programs, enabling them to practice speaking the language.
Classic works of literature in English are available in the public domain through Project Gutenberg.
Keeping up with current events in the English-speaking world is vitally important to the learner. English-language periodicals including the New York Times and Time magazine are available online, and are great for building vocabulary.