* Added course in Web Development
ASP.NET Core Beginner Tutorial

* Revert "Updated youtube playlist link for ASP.NET Core Tutorial"

This reverts commit 8042666c76b32dcbd8708dd8f10b11a6e9f8b7bf.

* Added Next.js and "Mastering Next.js" course

* spaces

* no trailing slash

* Update free-courses-en.md

Added Flexbox & CSS Grid free video resources to the repo

* Update free-courses-en.md

* Update free-courses-en.md

Removed the trailing slashes from the root domain

* Update free-courses-en.md

Added free Javascript30 course from Wesbos

* Markdown video course

Added free Markdown video course

* Update free-courses-en.md

* Add: Beginner's Series to: JavaScript & Beginner's Series to: Node.js

* fix link

Added  python and HTML/CSS course links for beginners as part of hacktoberfest2020 (PR resubmission) (#4298)

* Added a python course link

As  part of hacktoberfest20

* updated free-courses-en.md with a new link

As  per the requirements the link is alphabetically added

* Added an HLML&CSS course link

* Changed the extra blanklines

* updated with platform and tutor name

* updated the course list

* Updated the file again

* updated the list

* Added Dart Programming

* Added dart programing language

* Added data structure course by mycodeschool

* link changed to playlist

* Update free-courses-en.md

Added Flexbox & CSS Grid free video resources to the repo

* Update free-courses-en.md

* Update free-courses-en.md

Removed the trailing slashes from the root domain

* Update free-courses-en.md

Added free Javascript30 course from Wesbos

* Update free-courses-en.md

* Update free-courses-en.md

* added courses

* space fixed

* Update free-courses-en.md

Added Flexbox & CSS Grid free video resources to the repo

* Update free-courses-en.md

* Update free-courses-en.md

Removed the trailing slashes from the root domain

Added one course link on machine learning topic

* Added Open Source Reading Materials and Videos of Python for Everybody offered by Coursera

* Removed Coursera link and changed resource title

* Alphabetical ordering

* Stanford Java course link

* put the new link alphabetically

* add react native tutorial

* add author's name for react native course

* add a space line

* [Princeton Algorithms, Part 2](https://www.coursera.org/course/algs4partII)
* [Machine Learning Mini Bootcamp](https://lambdaschool.com/free-course-machine-learning/)

Links were down as of 10/17/20

* Learn Ruby

Added a Ruby online material for learning

* Formatting updated

I formatted the contribution by fixing the alphabetical order of my Learn Ruby tutorial.

Added a new Python programming tutorial

Added a new Python tutorial

Added a new PHP tutorial

* Update free-courses-en.md

* Update free-courses-en.md

I have added a new course on Databases - DML Statements and SQL Server Administration.

* fix ordering

most likely this problem was introduced by conflicting merges

* alphabetize