Lots of free online courses are available on iversity to enhance your subject knowledge.

You can enroll to some of the courses which are really helpful to understand your subjects.
Just check your favorite subject and enroll for it at https://iversity.org/courses?r=cae11

Their is a certificate for you from some of the top German universities after successful completion of course.

Below are some really interesting courses you can join------->>>>

For Mechanical, Automobile and Production engineering students

1)Vehicle dynamics 1 --http://iversity.org/c/30?r=cae11

2) Vehicle dynamics 2--http://iversity.org/c/31?r=cae11

3) Vehicle dynamics 3-- http://iversity.org/c/32?r=cae11

For CSE students

1) Public Privacy: Cyber Security and Human Rights--http://iversity.org/c/28?r=cae11

2) Web engineerining 1 --http://iversity.org/c/18?r=cae11

3) Web Engineering 2 -- https://iversity.org/c/10?r=cae11

For Pharmacy students

DNA - From Structure to Therapy -- iversity.org/c/10?r=cae11
Also different courses are available for architectures,Entrepreneurship and much more just visit http://iversity.org/courses?r=cae11

All the best for the courses and remember to conform your email after enrolling to the course to get instant updates.

5 Easy steps to enroll------>

1) Go to your favorite course,Click Enroll
2) Fill all your details to register.
3)Go to your email Inbox which you gave for Iversity registration.
4)Activate the Iversity account by clicking to the link in conformation message in mail
5)Get instant updates and enjoy the courses