Some of the best resources I've found....

I want to keep a list of resources that I've found that are really wonderful.  I'll update it periodically and try to organize it the best I can.  So there might be redundancies (Sorry for that!)

Training:
Plumgrid (Free Openstack Associate certification) 
A Cloud Guru (Fee based - AWS Training)
Spark Fundamentals (Free Spark 101 Training with cert. of completion)
Linux Academy (Fee based - AWS, Linux, Openstack Training) 
Python Training (Python testing is linked)
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Programming:
Python programming List (A huge list of everything python (python, django, data science, neural networking, etc) programming training and details about them)
Hackerrank (A.I., data structures, machine learning, python, C++, SQL, databases, security, everything!)
Learn Python the hard way (Online book)
Testing Regex
LeetCode ( Preparing for technical coding interviews in C, C++, Java, Python, C#, JS, Ruby, Bash, MySQL)

Software:
Github
BitBucket
TravisCI
Jenkins
Vagrant
VirtualBox


Electronics:
CircuitLab (Online circuit simulator)


Books (either open source books or places that give books away):
PacktPub (free books everyday!)
Data Structures and python
An introduction to Algorithms & Data Structures in Python
Pro Git

Security:
One time secrete sharing (Creates a 1 time website that is encrypted and expires after 7 days)