2012 Writer's Festival. There are also other programs for sale that I have not used.
If you've not used Scrivener, I highly recommend it. I didn't think I would like it, but it grew on me and now I feel that it's indispensable. Features I really love:
1. Being able to break up chapters across "cards" that can be moved around at will. Sure, you can copy and paste stuff around in Word, but this is really so much more elegant and I loved it for when I was experimenting in what order to place all the Foreword / Copyright / Trigger Warning / Table of Contents / Note to the Reader / Dedication stuff.
2. Being able to jot chapter notes on the front of the "cards" in order to view the entire novel outline at a glance is just delightful. (Organizing the "cards" in folders to get deeper categorization, like for an epic trilogy that you want to keep all in the same binder is also very groovy.)
3. Having "character sheets" for storing character descriptions and character images is so handy, but what I like even more is being able to highlight text in the novel, right-click, and then hit "Send To --> Frodo Baggins" and then you've just placed a copy of "he was a tiny fellow, with absurdly blue eyes and hair so curly you wanted to run your fingers through it the moment you met him" right there in his character portfolio so you will always have it available to refer to and you won't have to later hunt for WHAT COLOR WERE HIS EYES AGAIN?
4. The "compile into an ePUB" option isn't 100% intuitive and the output can still do with some tweaking in Sigil if you're a perfectionist like me, but it's currently (in my opinion) the easiest way to get a home-written novel into ePUB format at this time. (The second "easiest" way being to copy and paste plain text from Word into Sigil and then hunt down all the rich text, like italics, in the Word source document and manually jam them back into Sigil. I have done this, thrice, and it's a pain.)