Everywhere you walked, you saw people who made something -- either a costume or knitted item. And there are a LOT of knitted & crocheted items at Gallifrey One. There's a Ravelry forum, Who Knits, that's just dedicated to Doctor Who fiber arts.
The biggest knitted item for Gallifrey One is, obviously, the infamous Doctor Who scarf. I made one for myself (albeit using a knitting machine) several years ago. I saw plenty at Gallifrey with some interesting twists.
There were some interesting ways to wear them. I mean, what do you do with a 13 foot scarf?!?
Wear it ala Toga style!
You can turn it into a dress:
If that's wool, she's gotta be really warm!
Of course, you can always turn a scarf into a raglan sweater. (I'm going to need to steal this idea!) Her aunt had made this for her years ago. It's a crocheted sweater out of sport weight with small bits of lace.
The scarf wasn't the only knitted or crocheted bit of goodness at Gallifrey. I saw one crocheted Tardis and a mashup of 4th & 11th Doctor goodness.
There was also an amazing vendor (Hand-Knit Habitat) who sold HAND-KNIT scarves, hats, and knitting kits for those who don't knit, and she sold out of nearly ALL of her stock during the convention. It was awesome to see a successful knitter. I bought one of her knitted bow-ties in support.
She specializes in Science Fiction knitting, which I highly approve!