One of the best sources for initial education on the basics of Quantum Computing is Quantum Computing for the Determined by Michael Nielsen. This consists of 22 short videos that discusses The Basics, Superdense Coding, Quantum Teleportation, and The Postulates of Quantum Mechanics. Highly recommended.
David Deutsch has posted six video Lectures on Quantum Computation designed as an introduction to the quantum theory of computation.
The Perimeter Institute has posted a series of 14 hour long lectures by Daniel Gottesman called the Quantum Information Review. This lecture series was recorded relatively recently in 2015 and they can be downloaded in multiple formats (MP4, MP3, and PDF).
Caltech has online the course material for Physics 219, Quantum Computation. This is a course which has evolved for over 10 years and now has over 400 pages of material online in nine chapters. You can find this course at: http://www.theory.caltech.edu/people/preskill/ph229/
UC Berkeley has an online course titled: Quantum Mechanics and Quantum Computation. They describe it as a simple conceptual introduction to quantum mechanics and quantum computation. This is billed as a 9 week course that would take 5-12 hours of effort per week. It is billed as being at the “intermediate” level but they do say that a strong background in linear algebra is required. You can find the course at the following location: https://www.edx.org/course/quantum-mechanics-quantum-computation-uc-berkeleyx-cs-191x#.VOugFrDF9sA
MIT offers a Quantum Practitioner Curriculum that offers two different series of on-line courses. The first is called the Foundations of Quantum Computing that consists of a series of video lectures from MIT professors with associated problem sets. There is no cost for this series, but MIT does offer an optional certificate of completion for those who pass the course at a nominal fee. The second series is a paid professional development series called Applications of Quantum Computing. Learners who pass one of these paid-only online courses will earn Continuing Education Units (CEUs) and those who pass all four courses will earn an MIT Professional Certificate. Details on both of these series and links to enroll in the courses can be found on the MIT web site at https://quantumcurriculum.mit.edu/.
Dr. James Wootton of the University of Basel has developed a blog site called Decodoku and associated games devoted to the topic of quantum error correction. The site contains two games called Decodoku and Decodoku Puzzles where are available for download on both IOS and Android. Playing the games allows one to learn and do research on quantum error correction. In addition, the blog has a good series of posts that provide a good tutorial on quantum error correction.
There is a concise, yet very understandable brief on quantum annealing written by Brianna Gopaul. The brief describes how quantum annealing works, what organizations are developing quantum annealers, and applications where they may be used. You can view this brief at: https://www.linkedin.com/pulse/quantum-annealers-solving-worlds-optimization-problems-brianna-gopaul/.