License guide

Permissive open-source licenses

• Apache License 2.0The Apache License, Version 2.0, dated January 2004, is a permissive license published by the Apache Software Foundation for software and other works of authorship. Each contributor grants copyright and patent licenses, and the conditions deal mainly with passing on the license and keeping notices when the work is redistributed.Apache-2.0163 uses in the catalog
• MIT LicenseThe MIT License is a short permissive license for software. Its standard text is listed on the SPDX License List under the identifier MIT and is reproduced by the Open Source Initiative. The text is a template that begins with a copyright line naming the year and the copyright holders of each project that uses it.MIT67 uses in the catalog
• BSD 3-Clause LicenseThe BSD 3-Clause License, listed on the SPDX License List as the BSD 3-Clause "New" or "Revised" License, is a short permissive license. It permits redistribution and use in source and binary forms, with or without modification, under three conditions. The text is a template in which each project supplies its own copyright line.BSD-3-Clause8 uses in the catalog
• Apache License 2.0 with LLVM ExceptionsThis is the Apache License, Version 2.0 followed by two exceptions headed "LLVM Exceptions to the Apache 2.0 License". The LLVM Project's license file states that the project "is under the Apache License v2.0 with LLVM Exceptions". The SPDX License List records the exception as LLVM-exception and notes that it "was created specifically to be used with Apache-2.0". The Apache 2.0 terms apply in full except where the two exceptions change them.Apache-2.0 WITH LLVM-exception3 uses in the catalog
• BSD 2-Clause LicenseThe BSD 2-Clause License, listed on the SPDX License List as the BSD 2-Clause "Simplified" License, is a short permissive license. It permits redistribution and use in source and binary forms, with or without modification, under two conditions about keeping the copyright notice. The text is a template in which each project supplies its own copyright line.BSD-2-Clause2 uses in the catalog

Copyleft open-source licenses

• GNU Affero General Public License v3.0The GNU Affero General Public License, version 3, dated 19 November 2007, is a copyleft license published by the Free Software Foundation. Its preamble says it is "specifically designed to ensure cooperation with the community in the case of network server software." The SPDX identifier AGPL-3.0-only refers to code offered under version 3 only, as distinguished from "AGPL-3.0-or-later."AGPL-3.0-only2 uses in the catalog

Custom model licenses

• OpenMDW License Agreement, version 1.1The OpenMDW License Agreement, version 1.1 (OpenMDW-1.1) is a license for "Model Materials": one or more machine learning models, including architecture and parameters, and related artifacts such as data, documentation, and software. It is published on openmdw.ai, whose footer credits The Linux Foundation and its contributors. It grants permission to deal in the materials "without restriction," subject to a notice condition and a litigation clause.Custom license10 uses in the catalog
• Llama 3.1 Community License AgreementThe Llama 3.1 Community License Agreement is Meta's license for the Llama 3.1 models, code, weights, and documentation, which it calls the "Llama Materials." Its version release date is July 23, 2024. It grants a limited, royalty-free license with conditions on notices, naming, acceptable use, and licensees above a size threshold.Custom license3 uses in the catalog
• Llama 4 Community License AgreementThe Llama 4 Community License Agreement is Meta's license for the Llama 4 models, code, weights, and documentation, which it calls the "Llama Materials." Its version effective date is April 5, 2025. It grants a limited, royalty-free license with conditions on notices, naming, acceptable use, and licensees above a size threshold.Custom license3 uses in the catalog
• BigCode OpenRAIL-M v1 License AgreementThe BigCode OpenRAIL-M v1 License Agreement was "created under BigCode, an open and collaborative research project" on large language models for code, and its preamble says it "is generally applicable to any machine-learning Model." It grants a royalty-free copyright license for the Model and Modifications of the Model and a royalty-free patent license for the Model, conditioned on use restrictions listed in Attachment A. Source code, training data, and explanatory documentation are not licensed under it.Custom license2 uses in the catalog
• LFM Open License v1.0The LFM Open License v1.0 names Liquid AI, Inc. as the Licensor and is published in Liquid AI's LFM2.5 model repositories on Hugging Face. Its definitions, copyright and patent grants, and redistribution conditions closely follow the wording of the Apache License 2.0. It adds a Commercial Use Limitation in Section 5 tied to an annual-revenue Threshold that the license defines, and a termination clause in Section 11.Custom license2 uses in the catalog
• NVIDIA Open Model License AgreementThe NVIDIA Open Model License Agreement is NVIDIA Corporation's license for models it releases under it; the version on NVIDIA's agreements page was last modified on October 24, 2025. Its opening states that models under it "are commercially usable," that licensees are free to create and distribute Derivative Models, and that NVIDIA does not claim ownership of outputs. These statements are subject to the agreement's conditions.Custom license2 uses in the catalog
• Gemma Terms of UseThe Gemma Terms of Use are Google's terms for the Gemma models listed in the appendix of the terms page, among them Gemma 1 through Gemma 3, Gemma 3n, EmbeddingGemma, PaliGemma, ShieldGemma, and CodeGemma. The page was last modified on April 1, 2026, and says Gemma 4 has its own separate license. The terms govern using, reproducing, modifying, and distributing Gemma and "Model Derivatives," including through hosted services.Custom license1 use in the catalog
• Meta Llama 3 Community License AgreementThe Meta Llama 3 Community License Agreement is Meta's license for the Meta Llama 3 models, code, weights, and documentation, which it calls the "Llama Materials." Its version release date is April 18, 2024. It grants a limited, royalty-free license with conditions on notices, naming, acceptable use, and licensees above a size threshold. The license file in Meta's llama-models repository also contains the Meta Llama 3 Acceptable Use Policy.Custom license1 use in the catalog
• xAI Community License AgreementThe xAI Community License Agreement is X.AI LLC's license for materials that xAI designates as subject to it; the copy published with the Grok 2 repository on Hugging Face was last updated on November 4, 2025, and designates the Grok 2 model and related artifacts. It grants a revocable license to use, reproduce, distribute, and modify the Materials for non-commercial and research purposes, and for commercial use under conditions.Custom license1 use in the catalog

Non-commercial licenses

• Apple Machine Learning Research Model License AgreementThe Apple Machine Learning Research Model License Agreement is Apple Inc.'s license for models it releases "for the sole purpose of scientific research of artificial intelligence and machine-learning technology." It grants a limited license to use, copy, modify, distribute, and create Model Derivatives exclusively for Research Purposes. This guide uses the copies published in Apple's OpenELM-3B-Instruct and FastVLM-7B repositories on Hugging Face, which are identical.Custom license2 uses in the catalog
• Creative Commons Attribution-NonCommercial-ShareAlike 4.0 InternationalCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) is a public license published by Creative Commons. It permits sharing and adapting the licensed material for NonCommercial purposes only, with attribution, and requires anyone who shares an adaptation to license it under the same or a compatible license.CC-BY-NC-SA-4.01 use in the catalog

Data licenses

• Community Data License Agreement – Permissive, Version 2.0The Community Data License Agreement – Permissive, Version 2.0 (CDLA-Permissive-2.0) is a short agreement for sharing data, published on cdla.dev, a site of The Linux Foundation. Data Providers and Data Recipients agree that recipients may use, modify, and share the data, with one condition on sharing. It treats "Results," which it defines to include machine learning models, separately from the data itself.CDLA-Permissive-2.03 uses in the catalog
• Open Data Commons Attribution License v1.0The Open Data Commons Attribution License (ODC-By) v1.0, published by Open Data Commons, is a license for databases. Its preamble says it is intended to allow free sharing, modifying, and use of a database "subject only to the attribution requirements set out in Section 4." It governs rights in the database itself, not in the individual contents, which may carry their own licenses.ODC-By-1.03 uses in the catalog

Content licenses

• Creative Commons Attribution 4.0 InternationalCreative Commons Attribution 4.0 International (CC BY 4.0) is a public license published by Creative Commons for material covered by copyright and certain similar rights, including database rights. It lets anyone reproduce and share the material and adapted versions of it, with attribution as the main condition. Creative Commons states on the license page that it "is not a law firm and does not provide legal services or legal advice."CC-BY-4.09 uses in the catalog

Licenses without a guide yet

Other licenses that records in the catalog use. Each record links to its license text; guides are added over time.

• Profluent-E1 Clickthrough License Agreement (3)
• Health AI Developer Foundations Terms of Use (2)
• Apple software license (CoreNet) (1)
• Apple software license (ml-fastvlm code) (1)
• BSD 3-clause copyright license plus a limited patent license (wdl_limited folders) (1)
• BSD-style license (Battelle Memorial Institute) (1)
• Common Crawl Terms of Use (limited, non-exclusive license) (1)
• Common Crawl Terms of Use (original Nemotron-CC release) (1)
• Custom licenses (hipCUB, RCCL) (1)
• DINOv3 License (1)
• GNU General Public License v3.0 (ROCgdb) (1)
• GPL 2.0 with Linux-syscall-note (ROCK-Kernel-Driver) (1)
• Microsoft Research License Terms (1)
• Modular Community License (MAX package usage and distribution) (1)
• NVIDIA Data Agreement for Model Training (Nemotron-CC-v2 and v2.1) (1)
• NVIDIA Nemotron Open Model License (1)
• Open WebUI License (BSD 3-Clause terms plus a branding clause) (1)
• SAM License (1)
• TimesFM Non-Commercial License v1.0 (1)
• University of Illinois/NCSA Open Source License (Comgr, ROCR-Runtime, ROCm-Device-Libs, rocminfo, ROCR Debug Agent) (1)
• Waymax License Agreement for Non-Commercial Use (1)
• Waymo Dataset License Agreement for Non-Commercial Use (March 2025) (1)