There are many forums & online portal providing free online training’s and certification and this is very good opportunity for everyone to get familiarized with latest / trending subjects and also get certified.
Oracle Cloud Infrastructure (OCI) Learning
Click here – to register online free training and free certifications
Coursera Free online courses
Click Here – Register free online courses
Tableau eLearning
Click Here – Register and learn Tableau elearning for free
Harvard university online Courses
Click Here – to learn online free university courses
Pluralsight – Limited time offer free Courses
Click Here to register free courses
NASSCOM Free Online Courses
Click Here – NASSCOM INTRODUCES FREE ARTIFICIAL INTELLIGENCE COURSE AMID LOCK DOWN
Master of Project Academy
Click Here to unlock all the free training courses.
Note: Most of these training’s / courses are free only for certain duration. Please refer the respective portal to know the recent changes / update in the training.
DWBI castle 
Madhes, great curation. Thanks
I would recommend adding San Francisco Business School Free Programs to the list as well https://sanfranciscobs.com/p/free-programs
They come with a diploma and you can highlight it on your LinkedIn.