A huge thank you to all of you for creating these awesome tools!
Please note, when I save brushes, I jot down the user name of the creator on a scrap of paper at my computer, but sometimes I lose my scraps and then I don't know who made all my brushes. I make every effort to locate them, but... these things happen. So if you recognize yours, please let me know and I'll be happy to add your name to my list.
Most of the time, I can't tell you exactly who made a specific brush. The best thing you can do is browse 100x100_brushes and see if you can find it.