| fatcat | This repository contains source code for fatcat, an editable catalog of published research (mostly journal articles), with a focus on tracking the location and status of full-text copies on the public web, to ensure long term access. | https://github.com/internetarchive/fatcat |
| Invenio Framework v3 | Invenio Framework is like a Swiss Army knife of battle-tested, safe and secure modules providing you with all the features you need to build a trusted digital repository. | https://github.com/inveniosoftware/invenio |
| Sickle: OAI-PMH for Humans | Sickle is a lightweight OAI-PMH client library written in Python. | https://github.com/mloesch/sickle |
| Zenodo | Zenodo is a small layer on top of Invenio, a free software suite enabling you to run your own digital library or document repository on the web. | https://github.com/zenodo/zenodo |