[ Community Service ] Open Question : International Volunteer work (short term) - non religion affiliated?

Interested to know of any non-religious based volunteer opportunities for short term work in poor countries. For example, like the idea of Habitat building homes, but not interested in religious/proselytizing aspect of it. I do not belong to any religion, so if the work in some way involves promoting a religious/political view point, not my cup of tea. Also, am looking to provide physical labor, not much interested in meeting govt officials, NGO types, fund raising efforts, and so on. Thanks for suggestions.