Here are some other options, depending on the context:
* Nie ma za co - Literally "there's nothing for what," used when you feel you didn't do anything special.
* Z przyjemnością - "With pleasure," used when you were happy to help.
* Chętnie - "Gladly," similar to "with pleasure," used when you were happy to help.
* Nie ma sprawy - "No problem," used when you think the task was easy.
* W każdej chwili - "Anytime," used when you are willing to help again.
The best choice depends on the situation and your relationship with the person. "Proszę bardzo" is a safe bet in most cases.