The BibTeX (Latex) bibliography manager by KDEhttps://userbase.kde.org/KBibTeX/
KBibTeX is a BibTeX editor by KDE to edit bibliographies used with
LaTeX. Features include comfortable input masks, starting web queries
(e. g. Google or PubMed) and exporting to PDF, PostScript, RTF and
XML/HTML. As KBibTeX is using KDE's KParts technology, KBibTeX can be
embedded into Kile or Konqueror.