Instructables - Instructables is a place that lets you explore, document, and share your creations.
Hackaday.io - Hackaday.io is the world's largest collaborative hardware development community.
Hackster - Hackster is a community dedicated to learning hardware.
Maker.pro - Maker.pro is a place for makers to design and collaborate with one another, with the goal to take their product to market.
Maker.io - Maker.io is a hardware development community powered by Digi-Key Electronics.
Magazines
Electronics For You - These magazines keep the electronics fraternity updated with the latest technical knowledge about new technologies, semiconductors, components, systems, tools and techniques. It regularly features industry experts and top-shots within its pages.
Podcasts
The Amp Hour Electronics - It is the worlds largest and most respected electronics oriented radio show. Discussions range from hobbyist electronics to the state of the electronics industry, components, circuit design, and general on and off-topic rants.
Circuits and Electronics 3: Applications - Learn about cool applications, op-amps and filters in the design of microchips used in smartphones, computers, and the internet.
Collin's Lab - Collin Cunningham shares his adventures in science, sound, and electronics.
All About Circuits - This website provides a series of volumes covering electricity and electronics. The information provided is great for students, makers, and professionals who are looking to refresh or expand their knowledge in this field.
Electronics Hub - This website provide tutorials for basic electronics and beginner to advanced projects.
ElectronicsTutorials - The purpose of this site is to give students and beginners alike studying Electronics, good Basic Electronics Tutorials and information to help develop a knowledge and understanding of the subject of Electronics.
ElProCus - The Budding Electronic Engineers' Knowledge Space.
SparkFun - SparkFun is an online retail store that sells the bits and pieces to make your electronics projects possible. SparkFun also offers classes and online tutorials to help educate individuals in the wonderful world of embedded electronics.
Spinning Numbers - Learn the concepts of electrical engineering.