Update free-courses-en.md (#3737)

* Update free-courses-en.md

* Update free-courses-en.md

* Update free-courses-en.md

* Update free-courses-en.md

free-courses-en.md

@@ -57,6 +57,7 @@
 ### Algorithms & Data Structures
 
 * [Berkeley University CS 61B: Data Structures](http://datastructur.es/sp16/)
+* [Data Structures Easy to Advanced Course - Full Tutorial from a Google Engineer](https://www.youtube.com/watch?v=RBSGKlAvoiM) - William Fiset - (freeCodeCamp)
 * [IIT Bombay Foundation of Data Structures (CS213.1x)](https://courses.edx.org/courses/course-v1:IITBombayX+CS213.1x+1T2017/course/)
 * [MIT's Design and Analysis of Algorithms (Spring 2012)](https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-046j-design-and-analysis-of-algorithms-spring-2012) - Dana Moshkovitz, Bruce Tidor
 * [MIT's Design and Analysis of Algorithms (Spring 2015)](https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-046j-design-and-analysis-of-algorithms-spring-2015) - Erik Demaine, Srini Devadas, Nancy Lynch
@@ -105,6 +106,7 @@
 ### C
 
 * [C Programming Tutorial](https://www.youtube.com/playlist?list=PL_RGaFnxSHWoGzOXqtKeM71OLpvZbuU0P)
+* [C Programming Tutorial for Beginners](https://www.youtube.com/watch?v=KJgsSFOSQv0) - Mike Dane - (freeCodeCamp)
 * [Introduction to Computer Science](https://www.edx.org/course/introduction-computer-science-harvardx-cs50x#.VNsjDvmUcmQ)
 * [The Arduino Platform and C Programming](https://www.coursera.org/learn/arduino-platform)
 
@@ -112,12 +114,14 @@
 ### C Sharp
 
 * [C# 101](https://channel9.msdn.com/Series/CSharp-101) - Scott Hanselman, Kendra Havens Microsoft.
+* [C# Tutorial - Full Course for Beginners](https://www.youtube.com/watch?v=GhQdlIFylQ8) - Mike Dane - (freeCodeCamp)
 * [Learn how to program: C#](https://www.learnhowtoprogram.com/c) - Epicodus Inc.
 
 
 ### C++
 
 * [C++ Tutorial](https://www.youtube.com/playlist?list=PL_RGaFnxSHWoVZWSN-ze3VVtIfZfXwAGM)
+* [C++ Tutorial for Beginners - Full Course](https://www.youtube.com/watch?v=vLnPwxZdW4Y) - Mike Dane - (freeCodeCamp)
 * [Google's C++ Course](https://developers.google.com/edu/c++/)
 * [Introduction to C++](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-096-introduction-to-c-january-iap-2011/) (MIT's opencourseware)
 * [LearnCpp.com C++ Tutorial](http://www.learncpp.com)