Programming

Python

List of courses via Coursera
https://www.coursera.org/specializations/python

Python Data Science CheatSheet
https://s3.amazonaws.com/assets.datacamp.com/blog_assets/PythonForDataScience.pdf

Python Coding for the braves
This article briefly describes how we to convert Lat Long to address locations
https://towardsdatascience.com/reverse-geocoding-in-python-a915acf29eb6

Making simple choropleth maps with python codes
https://towardsdatascience.com/lets-make-a-map-using-geopandas-pandas-and-matplotlib-to-make-a-chloropleth-map-dddc31c1983d

R

ClassCentral
https://www.classcentral.com/course/edx-data-science-r-basics-9253

R Studio 
https://education.rstudio.com/

R Data Import CheatSheet
https://cdn.analyticsvidhya.com/wp-content/uploads/2017/02/17090748/R_dataimport.pdf

SQL

Codeacademy
https://www.codecademy.com/learn/learn-sql

SQL Tutorial (really user friendly)
https://www.w3schools.com/sql/

Cloud native, Java and Docker (containers)

Spring Boot Essential Training
https://www.lynda.com/Spring-tutorials/Spring-Boot-Essential-Training/653258-2.html?org=torontopubliclibrary.ca

Docker for Java Developers
https://www.lynda.com/Docker-tutorials/Docker-Java-developers/576584-2.html?org=torontopubliclibrary.ca

Cloud Native Twelve-Factor Applications
https://www.lynda.com/Web-Development-tutorials/Cloud-Native-Twelve-Factor-Applications/590843-2.html?org=torontopubliclibrary.ca