I recently was turned on to Google's Sketchup. It is totally free, includes video training and a place to upload designs. http://sketchup.google.com/index.html
Tutorial videos http://sketchup.google.com/tutorials.html
Advanced tutorials http://download.sketchup.com/downloa...Tutorials.html


Here is a small project I just finished working on a removable Canoe / Kayak truck rack http://sketchup.google.com/3dwarehou...aa3972dc5d43c8

Check it out!