Syntrax has a really good line of tasty protein powders. I especially like the nectar line's chocolate truffle, and vanilla bean. Both go really well in coffee and milk to make latte type drinks. they average 23 grams protien per scoop with 1g carbs and 110 cals
For bars I really like the think thin brand (i found them in target) a 240 cal bar has 20 grams of protein and 11ish net carbs (23 total but sugar alcohols and fiber brings it down to 11ish) the exact amount depends on the bar.
for snacks, greek yogurt and cottage cheese are both great ways to add protein.