The Blade Itself (3 books)
The Kingkiller Chronicle (waiting on third and final book)
The Stormlight Archive (waiting on third and final book)
There are 3 more books which read like sequels (same world, same heroes).
We've been waiting for years and still no information if this book is even in the works
Ten books are planned in the series. See wikipedia for reference.
The Blade Itself (3 books)
The Kingkiller Chronicle (waiting on third and final book)
The Stormlight Archive (waiting on third and final book)