Here are some maquettes that I did in Zbrush.

Hammer: real-time Maya screen grab.

Zbrush Model

Machete: real-time maya screen grab.

Zbrush Model

Here's a concept model for a project called "Sed de Saber."

Here's how the final turned out:

Speed Sculpts Under 4 Hours:

Rocky the Flying Squirrel

Built from competition-provided base mesh.

Cobra Commander

Built from competition-provided base mesh.