Source collection in translation.

Jackson, Peter. The Seventh Crusade, 1244-1254: Sources and Documents.  Aldershot: Ashgate, 2009.

**This is an extraordinary collection, including pretty much everything except Joinville, the Rothelin Chronicle, and the hagiographers, which are all translated elsewhere. It includes translations of the important Arabic sources, some of which are not even properly edited in Arabic, including Ibn’ Wasil and al-Maqrizi.

 A section on Louis’ crusades appear in Bird, Jessalyn, Edward Peters, and James M. Powell, eds. Crusade and Christendom: Annotated Documents in Translation from Innocent III to the Fall of Acre, 1187-1291. Philadelphia: University of Pennsylvania Press, 2013, p. 348-393, including materials listed below, and other sources.
Jean de Joinville

Vie de Saint Louys

French edition and modern French translation: Joinville, Jean de. Vie de Saint Louis. edited by Jacques Monfrin Paris: 1995.

English Translation: Joinville and Villehardouin. Chronicles of the Crusades. Translated by Caroline Smith. London: 2008.

Jean de Joinville. The Life of St. Louis. Translated by René Hague from the text edited by Natalis de Wailly. New York: Sheed and Ward, 1955.
 Louis IX’s  letter from from the East to his subjects in France (August 1250)

André Duchesne, Historiae Francorum scriptores coaetanei… Quorum plurimi nunc primum ex variis codicibus mss. in lucem prodeunt: alij vero auctiores & emendatiores. Cvm epistolis regvm, reginarvm, pontificvm … et aliis veteribus rerum francicarum monumentis. 5 vols. Paris: Sumptibus S. Cramoisy, 1636-1649, vol. 5:428-432

Translation found in Hague translation of Joinville, Crusade and Christendom collection, and Jackson collection no. 70, pp. 108-115.
 Rothelin Chronicle (a continuator of William of Tyre, covering 1229-1261)

Continuation de Guillaume de Tyr de 1229 a 1261, dite du manuscrits de Rothelin. RHC Occ., vol. 2 (Paris 1859); 2:489-639.

L’estoire de Eracles empereur de la conqueste de la terre d’Outremer.  RHC Occ, vol. 2 (Paris 1859), pp. 1-481.

Translation: Janet Shirley. Crusader Syria in the Thirteenth Century. The Rothelin Continuation of the History of William of Tyre with part of the Eracles or Acre text. Aldershot: Ashgate, 1999.
Salimbene

Chronica

Salimbene de Adam. Chronica. Edited by G. Scalia Turnhout: 1965. Reissued as CCCM 125-125A (1998-1999).

Translation: Salimbene. The chronicle of Salimbene de Adam. Binghamton: 1986.
Jean de Sarrasin (Louis IX’s chamberlain)

Jean Sarrasin. Lettre à Nicolas Arrode (1249). Edited by Alfred Foulet, Lettres Françaises du XIIIe siècle. Paris: Champion, 1924.

 Beer, Jeanette M.A. “The Letter of Jean Sarrasin, Crusader.” In Journeys Toward God: Pilgrimage and Crusade, edited by Barbara N. Sargent-Baur, 135-155. Kalamazoo, MI: Medieval Institute Publications, 1992.

Translation: Bird, Jessalyn, Edward Peters, and James M. Powell, eds. Crusade and Christendom: Annotated Documents in Translation from Innocent III to the Fall of Acre, 1187-1291. Philadelphia: University of Pennsylvania Press, 2013, pp. 354-359.
Materials on Louis’ crusade can also be gleaned from Louis’ hagiographer. Other than Joinville, the principal texts are:

Geoffrey of Beaulieu

Geoffrey of Beaulieu. “Vita et sancta conversatio piae memoriae Ludovici quondam regis Francorum.” In Recueil des historiens des Gaules et de la France, 1-27. Paris.

Geoffrey of Beaulieau and William of Chartres. The Sanctity of Louis IX: Early Lives of Saint Louis by Geoffrey of Beaulieu and William of Chartres. Translated by Larry Field. Edited by M. Cecilia Gaposchkin and Sean Field. Ithaca, NY: Cornell University Press, 2014.

William of Chartres

William of Chartres. “De vita et actibus inclytae recordationis regis Francorum.” In Recueil des historiens des Gaules et de la France, 27-44. Paris.

Geoffrey of Beaulieau and William of Chartres. The Sanctity of Louis IX: Early Lives of Saint Louis by Geoffrey of Beaulieu and William of Chartres. Translated by Larry Field. Edited by M. Cecilia Gaposchkin and Sean Field. Ithaca, NY: Cornell University Press, 2014.

William of Saint-Pathus

Guillaume of Saint-Pathus. Vie de Saint Louis. Edited by H. François Delaborde, Collection de textes pour servir à l’étude et à l’enseignement de l’histoire 27. Paris: A. Picard, 1899.

Guillaume of Saint-Pathus (Confesseur de la Reine Marguerite). “Vie de saint Louis.” In Recueil des historiens des Gaules et de la France, 58-121. Paris.

Translation into modern French: Guillaume of Saint-Pathus. La vie et les miracles de Monseigneur Saint Louis. Translated by M. C. d’Espagne. Paris: Editions du Cèdre, 1971.