When someone thinks of Judo gear, there isn't much to think about beyond a gi and a belt (unless, of course, you want to list the various neoprene bandages for each joint that you have in your Judo bag). Nonetheless, there are people who make a lot of Judo-inspired products that might never see the light of day inside of a dojo. One such product is Toraki's Judo Shorts.
Toraki Judo shorts are basically shorts made out of Gi Pants. Their black, and according to the folks at toraki, don't necessary match your Judo Gi size (For example, I wear a size 4.5 gi, but the shorts were a 3.5) because Judogi are a bit baggier to meet competition rules. I bought these during the summer and have been wearing them since. They're very comfortable, and are great for working out in around the house, since they offer the same freedom of movement as gi pants do. Granted their not cheap (for the $25 they charge for the shorts I could easily buy two or three pairs of sweat shorts at a sporting goods store), but I highly recommend them if the money isn't an issue for you. I would also say, they make an interesting gift for the Judoka in your life who already has enough gis and books.