This is a repository of hundreds of thousands of papers in all areas of philosophy, many downloadable to free.
http://www.philpapers.org
They have more than 4500 topic areas including areas of philosophy and individual philosophers:
http://philpapers.org/categories.pl
http://www.philpapers.org
They have more than 4500 topic areas including areas of philosophy and individual philosophers:
http://philpapers.org/categories.pl