3D Hubs Knowledge Base: This comprehensive knowledge base covers various aspects of additive manufacturing, including tutorials, design guides, and material information. It is an excellent resource for beginners and advanced users alike. 
   URL: https://www.3dhubs.com/knowledge-base/ 

Learning Resources, Carbon Inc: Carbon is a technology company specializing in digital manufacturing and additive manufacturing solutions. They offers a range of 3D printers, materials, and software tools that enable manufacturers to produce complex and functional parts with exceptional precision and mechanical properties.  Carbon has gained recognition for its innovative approach to additive manufacturing and continues to push the boundaries of what is possible in the field.
   URL: https://www.carbon3d.com/resources/category/courses

7 Design for Additive Manufacturing (DfAM) Principles blog post: The CATI (Computer Aided Technology, Inc.) post discusses key principles to consider when designing for additive manufacturing (also known as 3D printing). The article emphasizes the importance of optimizing designs to fully leverage the benefits of additive manufacturing technology.
   URL: https://www.cati.com/blog/7-design-additive-manufacturing-dfam-principles/

Additive Manufacturing Community by Materialise: Materialise, a leading company in additive manufacturing, hosts an online community where professionals and enthusiasts can access articles, videos, and discussion forums related to the field. 
   URL: https://www.materialise.com/en/academy 

Additive Manufacturing for Innovative Design and Production: This online course by MIT on the xPRO platform provides a comprehensive introduction to additive manufacturing, covering its principles, technologies, and applications. 
   URL: https://learn-xpro.mit.edu/additive-manufacturing 

Additive Manufacturing Resource Library: GE Additive offers an extensive resource library that includes case studies, technical papers, design guidelines, and webinars on various additive manufacturing topics. 
   URL: https://www.ge.com/additive/resource-library 

All3DP: All3DP is a popular online platform that provides a wide range of resources for 3D printing and additive manufacturing, including news, tutorials, reviews, and a vast model repository. 
   URL: https://all3dp.com/ 

Fabbaloo: Fabbaloo is a blog-style website that offers news, analysis, and insights into the additive manufacturing industry. It covers various topics, including technology, materials, and applications. 
    URL: https://www.fabbaloo.com/ 

Formlabs Learning Center: Formlabs, a leading 3D printer manufacturer, hosts a learning center with guides, tutorials, case studies, and webinars that cover additive manufacturing concepts and techniques. 
    URL: https://formlabs.com/learn/ 

Make Parts Fast: Make Parts Fast is an online resource that focuses on providing news, articles, and educational content related to additive manufacturing, including design considerations and industry updates. 
    URL: https://www.makepartsfast.com/ 

Sculpteo 3D Printing Resources: Sculpteo offers a range of resources, including guides, tutorials, and case studies, to help individuals understand and optimize their additive manufacturing projects. 
    URL: https://www.sculpteo.com/en/3d-learning-hub/ 

TCT Magazine: TCT Magazine is an online publication that covers the latest news, articles, and insights into 3D printing and additive manufacturing. It offers a wealth of information for industry professionals. 
    URL: https://www.tctmagazine.com/ 

Ultimaker Academy: Ultimaker, a renowned 3D printer manufacturer, provides the Ultimaker Academy, an online learning platform that offers courses and resources for individuals interested in additive manufacturing. 
    URL: https://academy.ultimaker.com/ 

These resources offer a variety of educational materials, including tutorials, guides, case studies, and industry news, to help individuals learn about additive manufacturing and stay updated with the latest developments in the field.