I'm getting started on studying for my PhD qualifying exams, and I'll be reading somewhere around 100 books and probably hundreds of .pdf articles. I'll also be taking notes on most of those books, articles, and random thoughts related to both. So, I'm thinking I might need to do more than keep just my usual simple word/pages files, and I've been kicking around the web looking at possible applications that might help with this. I was wondering if you all had any opinions about the following apps, or if you all had better recommendations for things I should look at. 1) Scrivener. This looks simple enough to use, but not all that powerful or flexible. Good for notes, bad for pdf's and not sure how it is for organizing thoughts. The price is good, though. 2) DevonNotes/Think/etc. Haven't tried this yet, but it looks useful--particularly like the fact that it can organize pdf's. Not too expensive. 3) Ulysses. I can't see a reason to use this over 1 or 2, honestly. 4) Tinderbox. Ok, now this I don't understand at all, but I've been playing with the demo and it seems powerful, flexible, intuitive, and almost perfect. BUT, Oh dear lord is it expensive. $220??? It better come with a guarantee that I'll pass.... So, any thoughts? Any experiences with these? Will I regret not getting tinderbox? Am I forgetting something equally as good as the others? To recap, I want to keep notes, pdf's (or links thereto), and be able to organize them hierarchically and visually by author, subject, thesis, etc, etc. I'm doing an exam in literature, by the way, if that matters at all. So lots of authors, lots of books, lots of criticism, lots to organize.