Pork rinds - might kill you but low in carbs. You really have to be conscience of more than just the carb content - look at calories and fat content as well. Also, consider fiber content as it tends to cancel out some of the impact of carbs.
Almonds, no fat/no sugar yogurt, light babybel cheese, light laughing cow cheese, cashews, jello (no sugar added gelatin snacks), select power bars/meal replacements, soy and whey powder protein with water, sunflower seeds. There's plenty more but it really depends on your objectives.
Try looking for low Glycemic Index foods as well - use Google.