This page will list links relevant in the field of History.
Archives, Libraries
http://www.hab.de/
http://www.oesta.gv.at/
Opacs, Databases
http://www.regesta-imperii.de/
http://www.mgh.de/
http://warburg.sas.ac.uk/
Editions
Mansi (Scanned pages)
Migne Patrologia Latina
Acta Sanctorum (www.documentacatholicaomnia.eu)
Acta Sanctorum (acta.chadwyck.co.uk) (Full Text Database)
Bibliotheca Hagiographica Latina Manuscripta
Thiel Epistolae
Lib. pont. (Mommsen as scanned pages)
Historiae Anglicanae Scriptores X, ev. V. R. Twydsen (1652) (digital)
Early English Book (EEBO) (digital)
Geschichtsschreiber / Alte Editionen
Corpus Documentale Latinum Gallaeciae (CODOLGA)
Archive.org (contains a wide range of historical texts and academic books)
Thomas v. Elmham: Historia Monasterii S. Augustini cantuariensis (Hardwick 1858)
The Latin Library (digital versions of antique and medieval sources)
Bibliotheca Augustana (latin and greek full text sources)
Journals
Archivum Historiae Pontificiae
Stuart Jenks (ed.): Zeitschriftenfreihandmagazin
DigiZeitschriften – Das deutsche digitale Zeitschriftenarchiv (german journals)
Gallica – Bibliothèque numérique (french journals)
JSTOR (digital editions of international journals)