Here is the list of links to article which would improve your English speaking skill Drastically
Wikipedia - featured articles
Featured articles of Wikipedia
(This is a site that has a huge collection of links. Read up the more serious links pertaining to Sociology, Economics, Psychology, Growth of Civilizations. There's lots of topics that you can explore here)
Articles on Economics and Management (read the Columns and Opinions, not the news items)
Economic Times The Economist Knowledge @ Wharton
Articles on Humanities, Art and Gender
Hindu Sunday Magazine (read articles on: Lead, Issues, Essay, Focus, Environment, Literature - check the topic wise index)
On Politics and World affairs
Frontline (read articles listed under Column)
Editorials of key newspapers
The Hindu The Hindustan Times The Times of India (click the opinions tab and read articles listed there)
International
The New York Times The Washington Post The Times, UK Time
Science and Environment
National Geograhic Scientific American Science Now
Science Blogs (he is a scientist, posts regularly and his posts are usually good)
Free Books
Project Gutenburg (read the books in the html format using the Word Tracker)
Classic Reader (A collection of classic short stories)
Beasts and Super-Beasts, by Saki ( H H Munro)
Tagore
The Hungry Stones and Other Stories The Post Office
Tales from India by Rudyard Kipling (author of the Jungle Book)
Indian Tales The Jungle Book Just so Stories Plain tales from the hills
The Phantom Rickshaw and other Ghost Stories
Tales from Shakespeare and Dickens
Shakespeare by Charles and Mary LAMB Tales from Dickens
From Russia, with love, Aton Chekov
book 1, book 2, book 3, book4 Best Russian Short Stories
Mystery and Adventure
The Adventures of Sherlock Holmes by Sir Arthur Conan Doyle
Tales Lewis Carroll was also a Mathematician … books will interest Engineers and Mathematicians, He would have scored 1600 in GRE !!!
Alice's Adventures in Wonderland by Lewis Carroll