SolidWorks is a 2D & 3D Computer Aided Design (CAD) software created by Dassault Systemes that is commonly used in many mainstream engineering industries. It is quite popular due to its ease of use and it is especially kind to beginners. Even with a limited number of hours spent familiarising yourself with SolidWorks (e.g. through tutorials, etc.), it is possible to create some detailed 3D models.
The major drawback of any CAD software is the huge price tag! The reason for this is that software companies will issue licences for every computer with SolidWorks installed; a necessary pain that most companies will accept due to the greater profits (and cost saving) they can earn through the use of CAD tools.
In any case the news is pretty good for active university & college students as SolidWorks offers a student licence which gives full access to the program at about 5% of the full retail price. However, in order to qualify for this discount you will need to provide a valid student email from a registered University.