Knowledge sharing plays a very significant role in exchanging information, maintaining databases, creating improved learning environment and systems, etc. In recent decades, there has been a strong emphasis on promoting knowledge sharing in an all pervasive manner and remove any space and time barriers. E-learning tools and applications have immensely changed the way we access and share information. This book is a compilation of chapters that discuss the most vital concepts in this field such as learning platforms and content authoring, embedded knowledge systems, knowledge management, collaboration tools, new learning models, etc. The extensive content of this book provides the readers with a thorough understanding of the subject.