The uninstall process removes all data related to a module. To uninstall a module, you must first disable it. Not all modules support this feature.

FlatrateAssigns a flat shipping rate to products.
Shipping QuotesRetrieve and display quotes for shipping products.
ShippingGets products ready for physical shipment.
UPSIntegration of UPS Rates and Services Selection and Shipping Online Tools with Drupal. See for details.
U.S. Postal ServiceIntegration of USPS Rate Calculator and Mail Service Standards Web Tools with Ubercart.
Weight quoteAssigns a shipping rate to products based on weight.