Chapter 1: A Methodology for Measuring FLOSS Ecosystems.- Chapter 2: Mining data to profile communication in FLOSS communities.- Chapter 3: A Preliminary Theory for Open Source Ecosystem Micro-economics.- Chapter 4: Open Source Ecosystems and their need for a legal framework.- Chapter 5: Legal Aspects: Open Source License Compliance in Software Supply Chains.- Chapter 6: The Life and Death of Software Ecosystems.- Chapter 7: Onboarding and Retaining of Contributors in FLOSS Ecosystem.- Chapter 8: A Free and Libre Open Source Software (FLOSS) Initiative For a Sustainable Deployment in Oman.- Chapter 9: Crowd-based Methodology of Software Development in the Internet Era.