Hello Mudit !

Some of the most job-oriented and the courses which have good future scope you can try after graduating with Mechanical engineering  are :

1. Tech in Mechanical Engineering : It is a 2 years course . For pursuing this course you have to qualify GATE examination.
2. Piping design and manufacturing : It has also a good scope.
3. Robotics:  You can pursue this course from IITs and other privately run renowned colleges
4. Master of engineering in tool design : The subjects of this specialized course are: Auto CAD CNC programming , Unigraphics ( CAD and CAM) ,Application of hydraulics and pneumatics in tool design , The concept of reverse engineering and Press tools
5. Nanotechnology
6. Masters in business administration : Students often prefer this course after graduation , if they have interest in Management. For this you have to qualify CAT exam.
7. Operations management : This is another area in which you can look.

Some colleges in which you can pursue PG Diploma courses in Mechanical Engineering are :

1. IIT Gandhinagar
2. University School of Polytechnic and Skill Development
3. Kashi Institute of Technology
4. HIMT College
5. Government Polytechnic, Mumbai

Hope it helps !