Free

Both Autodesk and Solidworks Several companies are offering incentives to the unemployed engineering community.

Solidworks, through their SolidWorks Engineering Stimulus Package, is offering free 3D CAD software, free training materials, free certification, and job leads to unemployed US and Canada residents.

Autodesk, through their Autodesk Assistance Program, is offering free software licenses, free online training, reduced-cost classroom training, and discounts on certification. This offer is good until December 31, 2009.

Bentley has a similar program including software and training.

On a related note, Engineered Efficiency, Inc, is offering free Civil 3D training to "those who have recently lost their jobs".

If you know of any other resources, please add a comment.

Get your free 30 day trial of AutoCAD 2010 here. If you can't manage the download, you can request a DVD here. Both 32 and 64 bit versions are available. You are free to install it on multiple computers, each with their own 30 day time limit.
Here is my initial review of AutoCAD 2010, from February 5.

Here are some free Autolisp resources including tutorials and sample code:

If you are a student with a valid school issued email address, join the Autodesk Student Community where you can download FREE AutoCAD and other Autodesk software for architecture, mechanical engineering, and civil engineering (educational versions).

If you do not have a valid school issued email, you can invite a faculty member to sign up and they can give you access.

You can also find job postings, discussion forums and product tutorials there.

http://students.autodesk.com/

Update on the AutoCAD 2008 trial downloads (some of these are available in the U.S. and Canada only)