1) THE OUTLANDISH COMPANION Volume Two
The OUTLANDISH COMPANION Volume Two, covering THE FIERY CROSS, A BREATH OF SNOW AND ASHES, AN ECHO IN THE BONE, and WRITTEN IN MY OWN HEART'S BLOOD, was published on October 27, 2015.
See the OUTLANDISH COMPANION FAQ for more information.
2) The Official OUTLANDER Coloring Book
The Official OUTLANDER Coloring Book, a coloring book for adults, was published on October 27, 2015. Look here for more information.
Diana Gabaldon is still in the early stages of writing Book 9 of the OUTLANDER series. It takes her 3-4 years to write one of the Big Books, so we likely won't see Book 9 in print until 2017. Please try to be patient!
4) Novella about Hal and Minnie (untitled)
Diana announced in August 2015 that she is writing a novella about "18th-century bookselling and spies", featuring Lord John's brother Hal, Hal's wife Minnie, and possibly how Minnie came to know Jamie in Paris in the days before the Rising. For more information, look here.
5) E-book on how to write sex scenes
Diana has mostly finished writing this non-fiction e-book (about 40,000 words, working title BLUSHING OPTIONAL), but it doesn't yet have a publication date.
6) RED ANT'S HEAD, aka BROKEN WEB
This is a contemporary crime novel featuring Tom Kolodzi, set in present-day Phoenix, AZ. As far as I know, Diana is not actively working on this book.
Stay tuned for further updates!