Link of Some Free Courses for Students
1.   NPTEL        http://tempuri.org/tempuri.html   
2. Virtual Labs:  An Initiative of Ministry of Education Under the National Mission on Education through ICT  
3. eYantra        http://tempuri.org/tempuri.html       
4. Swayam :  An Initiative by Ministry of Education (Govt. of India)    http://tempuri.org/tempuri.html