The GNU Manifesto, penned by Richard Stallman in 1985, is a foundational text that kicked off the GNU Project and the free software movement. Simply put, Stallman wrote it to challenge the norm of software being locked down by its creators. He wanted to make a case for software that everyone could use, change, and share without restrictions.

In the groundbreaking essay "The Cathedral and the Bazaar," first presented in 1997 and later expanded into a book, Eric S. Raymond offers a profound analysis of the contrasting development models in software engineering. Drawing from his observations and personal experiences within the open-source community, Raymond juxtaposes two fundamentally different approaches to software development: the "cathedral" model, which is structured, hierarchical, and often closed-source; and the "bazaar" model, which is open, chaotic, and collaborative.

"The Open Source Definition" by Bruce Perens serves as a cornerstone document in the open source movement, meticulously outlining the criteria software must meet to be officially recognized as open source. Published as part of the Debian Free Software Guidelines, Perens adapted this definition in 1997 to set the stage for the launch of the Open Source Initiative, an organization dedicated to promoting open source software.

Tim O'Reilly dives into how freeware isn't just about getting stuff for free—it's a big deal in the tech world that's opening doors for more people to get involved and innovate. It talks about how freeware lets people from all sorts of backgrounds jump into using and creating digital tools without the hefty price tag, making the tech world a more inclusive place.

The Mozilla Manifesto, introduced by the Mozilla Foundation in 2007, articulates a set of principles aimed at preserving the internet as a global public resource that remains open and accessible to all. This manifesto is a reflection of Mozilla's commitment to promoting transparency, innovation, and opportunity on the internet, aligning closely with the organization's ethos as a pioneer of free, open-source web solutions like the Firefox browser.