Open Game Content Library
The Open Game Content Library is a repository for the Open Game License, by Wizards of the Coast, and system reference documents. Although these system reference documents are presented in various forms on the internet, they are presented here exactly as they were originally provided by their sources. This is especially important to ensure both that the documents are available from multiple sources and that they are available in their original, unadulterated form.
Open Game License 1.0a
Source: Wizards of the Coast
System Reference Documents
Source: Wizards of the Coast
Modern System Reference Document