by  The Wittgenstein Archives at the University of Bergen

• "Fragments", by Wittgenstein Archives, Bergen
• Bibliografia de y sobre Wittgenstein, by Carlos Salinas
• Wittgenstein.pagina
• Dictionary of Philosophy of Mind
• Architekturzentrum Wien: Haus Wittgenstein
• Charles L. Creegan: Wittgenstein and Kierkegaard
• Alessandro Lanni: Ludwig Wittgenstein
• SWIF: Ludwig Wittgenstein
• Christopher Robinson & Joseph Duemer read Wittgenstein's Philosophical Investigations
• Stanford Encyclopedia of Philosophy
• Papers of Ludwig Wittgenstein, by Jonathan Smith
• Bibliographie der deutsch- und englischsprachigen Wittgensteinausgaben, by Alois Pichler
• Culture and Value: A List of Source Manuscripts, by Alois Pichler
• Two Source Catalogues and a Bibliography, by Michael Biggs and Alois Pichler
• Lars Hertzberg: Forthcoming and projected work
• Österreich Lexikon
• Felix Gmür: Architektur ist eine Geste
• Kirchenlexikon
• Lois Shawver: Commentary on Wittgenstein's Philosophical Investigations
• Enciclopedia Multimediale delle Scienze Filosofiche: Ludwig Wittgenstein
• EMSF: Wittgenstein
• Philosophy Research Base
• T. P. Uschanov: Ludwig Wittgenstein
• Beats Biblionetz
• John Shotter: Four papers
• Brian W. Carver: Ludwig Wittgenstein
• Wittgenstein Studies - Gesamtbibliographie
• Der graphische Nachlaß von Ludwig Wittgenstein, by Andreas Roser
• A critical note on the editions of Wittgenstein's Remarks on Frazer's Golden Bough, by Andrzej Orzechowski and Alois Pichler
• Monographien und Sammelbände zu Wittgenstein 1949-1995, by Andreas Roser
• Philosophenlexikon
• Dictionary of Philosophical Terms and Names
• The Royal Institute of Philosophy
• The Knitting Circle: Philosophy
• A Visual Concordance to the Published Works, by Michael R. Biggs
• The Internet Encyclopedia of Philosophy
• Denis Paul: Wittgenstein in Real Time
• José Rodríguez de Rivera: Las filosofías de Ludwig Wittgenstein