Any that enhance quick reflexes (esp openers), provide endurance for sprinting between wickets all day (stayers at the crease), power for ball delivery, etc, etc.
Basically, and this is only my opinion, the actions (sprinting, throwing, accuracy, catching) required for success in cricket are identical in baseball, and could use the same drugs.
The fact that they are not built like brick dunnies makes it look less likely they are doped to the same extent as baseball players, but the temptation / knowledge / desire to do so would surely be there to the same level?
[Edit: yeah what PCutter said]