Bronze

Bronze is a material added and used by many various mods. Thermal Expansion adds it under the name Tinker's Alloy, but this was changed back to bronze when Thermal Foundation was released.

Engineer's Toolbox
Bronze can be used to make a Socket Frame. Other then that, it isn't very useful. It's created within a Multi Smelter.

Forestry
Bronze Ingots can be made in Forestry by combining 3 Copper Ingots and 1 Tin Ingot in a Crafting Table:

GregTech 5
Bronze dust can be created by combining 3 Copper dust and 1 Tin dust in the Crafting Table. This recipe is considered inefficient due to the ratio of materials:output being 4:3, which is 25% loss of materials.

Using a Mixer to combine the dusts is more efficient.

Bronze can also be created by combining ingots and/or dust in the Alloy Smelter. This recipe is considered more efficient than the shapeless crafting recipe, because it has a 1:1 input:output ratio, providing no loss of materials.

The Copper can be replaced with Tetrahedrite although this is less efficient.

IndustrialCraft 2
Bronze Dust can be made in IndustrialCraft 2 by combining 3 Copper and 1 Tin Dust, Crushed or Purified Crushed Ore. Ingots can be acquired by smelting the dust.

Thermal Foundation
Bronze can be made in Thermal Foundation by mixing Copper and Tin dust.

Then smelt the resulting blend into Bronze ingots.

Or else, the bronze ingots can be created directly in an Induction Smelter.