AutoCAD is a software application for 2D and 3D computer-aided design (CAD) and drafting. Extremely important software for a career in automobile companies.

Click here for free AutoCAD download : http://www.autodesk.in/products/autodesk-autocad/free-trial

Tutorials : http://www.youtube.com/playlist?list=PL970B66C256FA05E1

                http://www.arch.virginia.edu/computing/training/online/pdf/CAD%20Tutorial-Fangfang-110227.pdf

ANSYS computational fluid dynamics (CFD) simulation software is a comprehensive suite of products that allows you to predict, with confidence, the impact of fluid flows on your product — throughout design and manufacturing as well as during end use.

Ansys trained engineers can easily get jobs in reputed companies like TATA Motors, GE, Mahindra etc 

Click here for Basic Ansys Tutorials : http://www.mece.ualberta.ca/tutorials/ansys/BT/BT.html

MatLab

MATLAB (matrix laboratory) is a numerical computing environment and fourth-generation programming language. Developed by MathWorks, MATLAB allows matrix manipulations, plotting of functions and data, implementation of algorithms, creation of user interfaces, and interfacing with programs written in other languages, including C, C++, Java etc.

MatLab Tutorial Videos : http://www.mathworks.in/products/matlab/videos.html

                                       http://www.mathworks.in/products/matlab/webinars.html

MatLab Code examples : http://www.mathworks.in/products/matlab/examples.html

Wolfram Alpha : Online Computational Tool

Wolfram Alpha is a computational knowledge engine or answer engine developed by Wolfram Research. It is an online service that answers factual queries directly by computing the answer from externally sourced "curated data", rather than providing a list of documents or web pages that might contain the answer as a search engine might.

Click here to try out Wolfram Alpha : http://www.wolframalpha.com/