Added new resources

Author: Мето Трајковски

README.md

@@ -205,8 +205,12 @@ If the problems from [LeetCode](https://leetcode.com/) are not enough and you ne
 1. [Geeks For Geeks](https://www.geeksforgeeks.org/) - The site which **all** interested in algorithms (no matter if beginners or experts) should know! [YouTube channel](https://www.youtube.com/channel/UC0RhatS1pyxInC00YKjjBqQ) with many useful videos.
 2. [The Algorithms - Python](https://github.com/TheAlgorithms/Python) - Great GitHub repo with many algorithms written in Python ([Link](https://github.com/TheAlgorithms) from the same repo written in other programming languages).
 3. [CP Algorithms](http://cp-algorithms.com/) - Great page with excellent explanations for various algorithms.
-4. [KhanAcademy - Algorithms](https://www.khanacademy.org/computing/computer-science/algorithms) - Good explanations for some basic algorithms.
-5. [HackerEarth - Tutorials and Practice](https://www.hackerearth.com/practice/) - Practice problems and learn about many algorithms and data structures needed for competitive programming.
-6. HackerRank - YouTube tutorials
-    - [Algorithms](https://www.youtube.com/playlist?list=PLI1t_8YX-ApvMthLj56t1Rf-Buio5Y8KL)
-    - [Data Structures](https://www.youtube.com/playlist?list=PLI1t_8YX-Apv-UiRlnZwqqrRT8D1RhriX)
+4. [HackerEarth - Tutorials and Practice](https://www.hackerearth.com/practice/) - Practice problems and learn about many algorithms and data structures needed for competitive programming.
+5. [Google - Intro to Data Structures and Algorithms](https://www.udacity.com/course/data-structures-and-algorithms-in-python--ud513) - Free course on Udacity offered by Google (maybe this resource should belong into the [Courses](#Courses) section).
+6. [KhanAcademy - Algorithms](https://www.khanacademy.org/computing/computer-science/algorithms) - Good explanations for some basic algorithms.
+7. [USFCA Visualization Tool](https://www.cs.usfca.edu/~galles/visualization/Algorithms.html) - Great tool for visualizing data structures and algorithms, created by the University of San Francisco.
+8. [VisuAlgo](https://visualgo.net/en) - Another great tool for visualizing data structures and algorithms through animation.
+9. YouTube playlists with tutorials:
+    - [Data Structures by mycodeschool](https://www.youtube.com/playlist?list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P)
+    - [Data Structures by HackerRank](https://www.youtube.com/playlist?list=PLI1t_8YX-Apv-UiRlnZwqqrRT8D1RhriX)
+    - [Algorithms by HackerRank](https://www.youtube.com/playlist?list=PLI1t_8YX-ApvMthLj56t1Rf-Buio5Y8KL)