Here are links to Charles on other sites, including some full editions of poetry for free. I do not own or have any affiliation with any external sites. Everything I link to is freely available online, including the books. I will be adding more as time goes on.
Mary-Jo Arn's sites
Karolus.net
Charlesdorleans.net
Manuscripts
London, British Library Harley 682 (Not digitized, only the library record)
London, British Library Royal 16 F II (French poetry, along with the Pseudo-Héloise)
Paris, Bibliothèque nationale de France MS French 19139 (Poetry of Charles d’Orléans and d’Alain Chartier)
Paris, Bibliothèque nationale de France MS French 25458 (The main French manuscript, called the “autograph” because it’s partly in Charles’s hand)
Paris, Bibliothèque nationale de France MS Latin 1156B (Hours of Marguerite d’Orléans)
Poems Online
Some French poems
More French poems
Even more French poems
“Le Temps A Laissé Son Manteau” with audio for both modern and Middle French
Ballade 46 / Ballade XLVI, on backgammon
Editions Online
Charles d’Orléans: Poésies, ed. Pierre Champion (Gallica)
Fortunes Stabilnes: Charles of Orleans’s English Book of Love: a Critical Edition, ed. Mary-Jo Arn (Archive.org)
Les poésies du duc Charles D’Orléans, pub. sur le manuscrit de la bibliothèque de Grenoble conféré avec ceux de Paris et de Londres, ed. Aimé Louis Champollion-Figeac (Archive.org)
Poésies de Charles d’Orléans, ed. J. Marie Guichard (Project Gutenberg)
Other interesting links
Historical images of Charles and members of his family
Charles’s tomb on Findagrave.com
Pierre Champion’s book on Charles’s books (Archive.org, in French)
A nice article from the British Library, with special focus on manuscripts of Charles’s work
A blog post from an independent scholar about paleography and Charles