The Protein powders after workouts include
A: Whey Concentrate. Approximately 70% Whey, 30% Casein
B: Whey Isoalte. More pure and approximately 85% Whey, 15% Casein.
C: Whey Hydrolysate. More pure again and approximately 0% Casein I believe.
There's also Soy ones, or vegetarian ones like Nutrisport Protein 90+ Vegan
You can get protein powder on sites like Myprotein or Trueprotein which are customised protein blends and could include Protein sources like Egg.
Ones with Carbs are always good for helping to improve protein synthesis and also improve Glycogen recovery to the muscles.
Typical good Carbs in these include Maltodextrin and Waxy Maize Starch, but you can get simple / complex carb hybrids, like Glucomannan and Palatinose, where the Carbs are interlocked, so it's like having a simple Carb that digests at the same rate as a complex one, but rather than shoot your bloodsugar back up quickly, like simple Carbs normally do, such sugar hybrids work kind of like a time release air freshener, so you should get little short bursts of blood sugar elevation, over a long period of time, instead of a slow and steady elevation rate, that complex carbs could give you.
If you want to go Carb free, then powders could 9ncluide something like a small portion of Crushed Oats for example, so you can customise your own Carb levels.