The best way to enhance your skills and showing your skills specially applying abroad is to attend online courses and get certificates of them.

-If you have low CGPA, then take these courses and they compensate your bad CGPA.
-If you are sitting free at home after graduation, start taking the course and enhance your skills
-Even you do not get the certificate you will get the knowledge.
-Specially good for people want to do research.So start today and attend as many courses as you can.These are websites

1) https://www.coursera.org/
(for almost every field; >1000 courses; >100 universities; financial aid is available for paid courses)

2) https://www.udacity.com/
(for Computer Science; a.k.a University by Silicon Valley; short videos and intuitive teaching approach)

3) https://www.edx.org/
(based in Cambridge, Massachusetts and governed by MIT and Harvard)

4) http://ocw.mit.edu/index.htm
(MIT Open Courseware; MIT Courses Made Public)

5) http://www.mooc-list.com/
(a directory of Massive Open Online Courses, MOOCs)

6) https://iversity.org/
(for courses from European universities, research institutions and knowledge-based companies)

7) https://www.futurelearn.com/
(for British Open University Courses; focuses on learning through socializing; owned by The Open University UK)

8) https://www.openlearning.com/
(offers courses that focus on community, constructiveness, and student engagement)

9) https://www.canvas.net/
(offers courses that focus onpersonal growth, professional development, and academic inquiry)

10) http://www.complexityexplorer.org/

11) http://www.alison.com/

12) http://bigdatauniversity.com/

13) https://www.youtube.com/user/thenewboston/playlists

14) http://www.lynda.com/

15) http://www.udemy.com/

16) http://www.tutsplus.com/

17) http://www.stackskills.com/

18) https://www.codeschool.com/

19) http://www.codecademy.com/
(for programming language courses with interactivity )

20) https://bigdatauniversity.com/

21) https://novoed.com/courses

22) http://online.stanford.edu/
(offers a variety of professional education opportunities in conjunction with many of the University’s schools and departments; coordinated by VPTL)

23) https://www.khanacademy.org/

24) http://www.learnerstv.com/index.php

25) http://online-learning.harvard.edu/
(Harvard University)

26) https://www.duolingo.com/
(Learning Center for Languages)

27) http://www.w3schools.com/
(Paradise for Developers)

28) http://www.openculture.com/
(for Audio Books, EBooks, Courses, Movies, Languages and Textbooks; the best free cultural & educational media on the web)

29) https://www.futurelearn.com/courses/categories

30) http://www.microsoftvirtualacademy.com/

31) http://www.memrise.com/courses/english/

32) https://www.livecoding.tv/
(learn from expert coders live)

33) http://freevideolectures.com/

34) http://instructables.com/
(Best for Projects ideas & DIY Solutions)

P.S: Members can update with more websites as well.

thanks for such valuable information..