Help needed! We are working on creating a general citation import filter. So we need ODT/DOCX files containing citations that were created with EndNote, Mendeley, Citavi, Paperpile... and any other citation manager you like to use. The converter will also be available for other open source citation management tools. Please send us your sample files! [email protected]

@fiduswriter JabRef's internal format is just #bibtex We already have one for Citavi with a test case and some others, I think Mendeley is not yet supported because you can export it as a bib file
All other import formats are implemented here: https://github.com/JabRef/jabref/tree/main/jablib/src/main/java/org/jabref/logic/importer/fileformat

We also support integration with #LIbreOffice

jabref/jablib/src/main/java/org/jabref/logic/importer/fileformat at main · JabRef/jabref

Graphical Java application for managing BibTeX and BibLaTeX (.bib) databases - JabRef/jabref

GitHub
@fiduswriter LO integration happens through reference. marks. We support both our own custom layout format, jstyles, and the standard CitaitonStyle Language.
jstyles are documented here
https://docs.jabref.org/cite/openofficeintegration
OpenOffice/LibreOffice integration | JabRef