Linus Torvalds: He is known for creating the open-source software projects Linux and Git. Linux is the operating system at the foundation of a large number of servers, phones (via Android), and other devices. Git is a version-control system used by many software developers worldwide.

Kent Beck: Known for creating Extreme Programming, a software development methodology aiming to improve software quality and responsiveness to changing customer requirements. He also played a significant part in agile software development and has contributed to the creation of the JUnit testing framework.

Dylan Beattie: A tech speaker, author, and developer who invented the humorous "Rockstar" programming language. He's also known for creating tools, skills, and processes to help businesses deliver quality software solutions.

Ian Cooper: He's an experienced programmer and architect active in the .NET community. He's also known for his contributions to open source projects and his significant role in the London .NET User Group.

Simon Brown: He's the creator of C4 software architecture model and the author of "Software Architecture for Developers". He's known for his work on software architecture and helping organizations visualize their software architecture.

Martin Fowler: A prominent author and international speaker on software development. He's known for his work in object-oriented analysis and design, UML, patterns, and agile software development methodologies, including extreme programming.

Daniel Terhorst-North: Known for originating the term and the methodologies behind BDD (Behavior Driven Development), an evolution of test-driven development.

Sam Newman: He is recognized for his work in microservices, cloud, and continuous delivery. He's the author of "Building Microservices".

Andy Hunt: He is one of the original authors of the seminal software development book, "The Pragmatic Programmer", and a co-founder of the Agile Alliance. He is also the author of the programming methodology known as DRY (Don't Repeat Yourself).