Calendula. Probably my favorite winter flower. It'll bloom its head off all winter and spring. I have ten of these going in undersized pots. A great way to add a spot of color and cheer to any bleak area of the garden. These are from saved seed.
Tuscan kale and broccoli.
I was visiting a friend's garden in August, and on a whim I grabbed a single spent zinnia flower from her garden. When I found the flower in my pocket later that day, I tossed it into an empty big pot in my garden. I swear I think every single seed germinated--I've been pricking seedlings all fall long and giving them away to friends and family, transfering them to pots, etc. Very interesting that a single flower produced so much diversity--there are (in addition to the pinks and orange here) a couple bright yellow zins and one deep red one. But mostly pumpkin orange and carnation pink. These seem to be pretty mildew-resistant, to boot.