Beginner
Easiest skill level.
Javascript Enlightenment
The contents of this book are for developers who are working in a codebase using modern React, Vue, or Angular code and find recent JavaScript language updates/proposals to be causing too much indirection. And or, developers who want to drill into memory the latest and most commonly used JavaScript updates.
A Girl's Guide to Project Management
A Girl's Guide to Project Management is a blog for project, programme and portfolio managers and project delivery professionals. It's published by Otobos Consultants Ltd, a copywriting and content marketing firm that provides specialist project management materials and advice to small and medium-sized businesses.
C - Geeks for Geeks
C is a procedural programming language. It was initially developed by Dennis Ritchie as a system programming language to write operating system. The main features of C language include low-level access to memory, simple set of keywords, and clean style, these features make C language suitable for system programming like operating system or compiler development.
Games With Go
A video series that teaches programming via a series of small game related projects. The focus is on learning programming fundamentals, and having fun. Games with Go is open to all ages, and geared for beginners, though experienced programmers looking to learn gamedev basics will also get a lot out of it.