No cost training to becoming a data scientist

most required skills for a data scientist position based on ReSkill's analyses of thousands of job posts and free resources to learn each skill:

1. Python

• Learn Python Programming From Scratch by Udemy
• Learn to program in Python by CodeCademy
• LearnPython.org interactive Python tutorial  

2. Machine Learning

• Machine learning online
• Operational Intelligence and Machine Data with Splunk  

3. R Language

• R Basics - R Programming Language Introduction by Udemy
• Introduction to R at DataCamp
• Learn R at Code school  

4. Big Data

• Big Data University
• Big Data and Hadoop Essentials by Udemy
• Basic overview of Big Data Hadoopby- Udemy  

5. Statistics

• Statistics One by Coursera
• Statistics and Probability
• Probability & Statistics  

6. Data Mining

• Data Mining and Web Scraping: How to Convert Sites into Data by Udemy
• Data Mining by Coursera  

7. SQL- Test your SQL skills

• Interactive Online SQL Training for Beginners
• Sachin Quickly Learns (SQL) - Structured Query Language by Udemy
• SQL Tutorial by w3schools

8. Java

• Learn Java: The Java Programming Tutorial For Beginners by Udemy
• Learn Java - Free Interactive Java Tutorial 
• Learn Java Programming From Scratch - Udemy