1. Native Android Development by edureka!

2. Native iOS Development by CodeWithChris

3. React Native by The Net Ninja

4. Flutter by freeCodeCamp

5. Ionic 4 by DesignCourse

1. React by Academind

2. Angular 2 by Academind

3. Vue by Academind

4. MERN + GraphQL by Academind

5. Django by Corey Schaefer

1. DataCamp - you can get a free 2-months subscription here

2. DataQuest - unfortunately, not all courses are available for free

3. CS109 Data Science by Harvard - full lecture content is uploaded

4. Machine Learning by Andrew Ng - for the fascinating math b.t.s.

5. Neural Networks by deeplearning.ai - for you DNN fans

1. Back To Back SWE - over 50 comprehensive walk-through videos

2. LeetCode - built-in editor, hundreds of interview-style questions

3. Pramp - mock virtual interviews where you get to play both sides

4. InterviewCake - you get a free 6-weeks subscription here

5. GitHub Freebies - you really shouldn't do without this

6. Glider - fully-guided video solutions and built-in code editor

7. LeetCode Video Solutions - over 100 LeetCode explanations