Google Sketchup

Google SketchUp is software that you can use to create 3D models of anythinsg you like. Most people get rolling with SketchUp in just a few minutes. Dozens of video tutorials, an extensive Help Center and a worldwide user community mean that anyone who wants to make 3D models with SketchUp, can. Redecorate your living room. Design a new piece of furniture. Model your city for Google Earth. Create a skatepark for your hometown, then export an animation and share it on YouTube. There's no limit to what you can create with SketchUp. You can build models from scratch, or you can download what you need. People all over the world share what they've made on the Google 3D Warehouse. It's a huge, searchable repository of models, and it's free.

Google SketchUp Pro is a simple but powerful tool for exploring and presenting your ideas in 3D. SketchUp Pro is everything traditional CAD software isn't – quick to learn and intuitive to use.

Google Sketchup | Architecture | Civil Engineering | Interior Designers

Google SketchUp is the exciting free software package that makes 3D available to everybody. Whether you need to build 3D models for work, or you’ve just always wanted to explore 3D modeling, Google SketchUp was made for you. Still, it does take a bit of understanding to get started, so turn to Google SketchUp 7 For Dummies.
In classic For Dummies tradition, Google SketchUp 7 For Dummies gets right to the point so you can start creating 3D models right away. You’ll learn to:
# Set up SketchUp, learn about edges and faces, use inferences and guides, and build your first model
# Establish a basic end-to-end workflow for creating and sharing models
# Model non-boxy objects like terrain, characters, bottles, and spheres
# Add details like stairs, gutters, and eaves
# Spruce up your models with styles and shadows to add effects, make objects pop, and enhance realism
# Use the LayOut function to draw with vector tools, add text and callouts, and print your work
# Design buildings and objects, export your models to other design programs or to Google Earth, and explore 3D animation

If you want to learn to create 3-D models using Google SketchUp, this Missing Manual is the ideal place to start.