Great citation manager with solid integration to Word and Writer. Glad to see it available as Flatpak in the Software Manager as the installation instructions on the website are clunky. Just so you know, I had to use the manual method for installing the Zotero plugin for LibreOffice, which was really easy.
A wonderful reference manager. Works e.g. with LibreOffice and adaptable to many languages. It uses many different styles, for various fields of science.
If you need to keep track of your research--whatever it may be--Zotero is the tool to use! Drop in a ISBN, DOI, PMID, or arXiv, from whatever you're reading and it populates the item type, author, abstract, and numerous other fields. I use LibreOffice, and the plugin works perfectly; I drop a quote and Zotero generates a footnote/endnote, and bibliography. Add something and the note numbers change to match. I barely scratch the surface of what Zotero is capable of, but I find it a joy to use. Less formatting, more typing. Terrific add-on!