This could refer to several things.

• forging - A manufacturing process for shaping metal.
• forge_(hearth) - A type of hearth used for heating metals.
• smithy - A place where forging is done.
• counterfeit - A copy or fake version of something being portrayed as the original.

Artists:

• forge_(artist) - DNP artist
• forgey

Characters:

• coldforge - A MLP fan character.
• forge_(hunterx90) - A brown anthro wolf character.
• forge_the_pregnant_goblin_(character) - A goblin humanoid character.
• forge_(zebak) - A black and red anthro character.
• geordi_la_forge - Main character from star_trek.
• metal_forge - A MLP fan character.

Copyrights:

• oren's_forge - Web comic