I'm evaluating their trial version right now.
It seems very useful, but I'm still experimenting with it.
It's priced at $40 (or $30 with a coupon), and it syncs with Scrivener.
Here's their website:
http://www.scribblecode.com/
It would appear to be extremely beneficial for someone working on a novel or with complex writing that involves keeping track of dates and events.
Software like this would be invaluable for someone trying to keep track of multiple POVs, or different historically dated storylines, or complex storyline elements in a science fiction novel, for example.
I'm not certain if my writing conveniently fits into those areas for me to justify spending $30 (which I think is a bargain, by the way). Unfortunately, I only have 18 days left to evaluate it.
So: Is anyone using this software? If so, please let us know what your experience has been with its use.