Directly:
* Someone has given woolen clothes to the poor.
* People have given woolen clothes to the poor.
* The charity has given woolen clothes to the poor. (If you know who gave the clothes)
More specific:
* The volunteers distributed woolen clothes to the poor.
* The government provided woolen clothes to the poor.
* The local church collected and gave woolen clothes to the poor.
Focus on the action:
* Woolen clothes were distributed to the poor.
* Woolen clothes were provided for the poor.
The best way to change the sentence depends on what you want to emphasize and the context.