The digital collection World War I Glass Plate Stereographs 1914-1929 has been created by Pennsylvania State University Libraries. This collection contains 368 stereoscopic photographs taken between 1914 and 1927. The photos were mainly taken in France, a few in Belgium, Germany, Italy, Macedonia and Greece. In particular the American Expeditionary Force and an afterwar meeting of the American Legion near Paris in 1927 come into view. Some of the images show most graphic injuries and soldiers killed in action. You can browse the images and filter them for year. There is also a simple free text search and an advanced search mode. For each stereograph both images are shown, without digital animation. There is a separate finding aid for this collection.
The digital collection Stereoscopic images of World War I has been created by Yale University Library. The stereoscopic photographs and some 200 other photographs are part of the Darrot papers (Yale University Library, MS 591). Paul Jean Gaston Darrot (1892-1958) served with the French infantry, the artillery and the communication service of the engineers; most of the pictures stem probably from this period. The images were mainly taken in France, some after the First World War. A blog post from 2013 by Andrew Berger (Manuscripts and Archives Department, Yale University Library) provides some background to this digital collection. You can only see the original double images, there is not an animated version or a red-cyan 3D version. There is also an online finding aid for the photographs in the Darrot papers.
The virtual presentation ECPAD: Première guerre mondiale is part of the ECPAD portal, the website of the Établissement de Communication et de Production Audiovisuelle de la Défense in Ivry-sur-Seine, the communication branch of the French defense ministry. At its portal ECPAD presents a selection of videos and photographs from its vast collection of First World War items, some 110,000 photographs (97,000 of them in the series SPA) and 2,000 films (series 14.18) which all have been digitized for the centenary of the Grande Guerre. One can consult the digitized items at the mediathèque in the old fortress Fort d’Ivry or order digitized images. ECPAD offers a very brief overview of its original audivisual collection created between 1915 and 1915, a general overview of materials from private collections concerning the Grande Guerre (PDF), and also succinct overviews of their First World War materials for a number of countries in Europe, Africa and Asia, and a set of fiches for each French département.
The online selection touches upon many themes in a wide variety of resources, among them for example coloured photographs (autochromes, 25 images in the selection, mainly to be found in the AUL series) and some 20,000 stereoscopic images (photographies stéréoscopiques, series D2 and D198), images of Russian soldiers in France, of prisoners of war, of the first American soldiers arriving in 1918, exercising army units, and much more. Only seven stereoscopic images are available online (animated versions).
There are only a few digital collections with French autochromes from the First World War. The main other collection is at the Mediathèque de l ‘Architecture et du Patrimoine, discussed also here. Parts of both collections appear also elsewhere. A third major collection is held at the Musée départemental Albert Kahn in Boulogne-Billancourt. The virtual exhibition of this museum is described here. At Arago-Le Portail de la Photographie you find more about several early techniques for colour photographs.
The virtual exhibition 14-18, une guerre photographique has been created by the Musée Nicéphore Niépce in Chalon-sur-Saône, a museum for the history of photography. This virtual exhibition has two sections. The first section, Le Miroir, une revue photographique, Août 1914-Décembre 1919 contains some 280 issues of this weekly published illustrated journal. The explicit goal of this journal during the First World War was to strengthen the links between soldiers and the general public, and to support the war efforts. The second section, Les yeux de la guerre, vues stéréoscopiques [The eyes of the war: stereoscopic views] contains nearly 700 stereoscopic photographs taken during the First World War. These images are organized along a number of themes. In order to view the images with a 3D-effect you have to install the Unity 3D plugin. For viewing the stereoscopic effect you will need stereoscopic glasses (red/blue). The website can be viewed in French or English.
The digital collection Stereoscopic Views, World War I has been created by the Monash University. This collection with some 260 images consists of four subcollections held at Monash University Library Rare Book Collections. You can browse all items by leaving the search field empty, or search for authors, titles and dates. You can view and download the original images. There are no animated versions of them online.
The photographs were published by the Keystone View Company. The descriptions of the images contain the original accompanying texts on the back of the photographs; the backs have been digitized, too. Technical data are provided, but often there is no clear indication of the creator, place and date. Twenty images show the Australian Expeditionary Force. Some images were made after the First World War. Many images depict scenes in France and Belgium, but some photographs were taken elsewhere in Europe or in the United States.
At Great War in 3D you can find information about this series and other Keystone series showing the First World War. Monash University presents also 90 digitized stereoscopic photographs in colour from the Russo-Japanese war.
The virtual exhibition Primera Guerra Mundial is a project of the Casa de la Imaginem, an audiovisual archive in Logroño, Spain. At their website the Casa shows some thirty photographs taken by an unidentified French officer during the First World War near Ypres, elsewhere in Flanders, at Arras and at the Somme. They form part of a collection with some 500 stereoscopic photographs discovered in 1999 in Tanger. Alas the virtual exhibition shows of each stereoscopic set just one image, but luckily you can view a four minutes video with some of these images at Vimeo. In 2007 an exhibition was held to show these images after restoration; you can download a dossier about it in French or Spanish.
At the French centenary portal Mission Centenaire you can view thirty photographs from the collection at Logroño with full information about the locations shown, again without animated stereoscopic images. There is a link to a fourteen-minute video at Vimeo showing a selection of images, accompanied by music.
The digital collection The Walter Koessler Project is a blog created by Dean Putney presenting a selection from the thousand photographs taken privately during the First World War by his great-grandfather Walter Koessler, a German officer. His photographs show many sides of the German army, including training and aircraft. Koessler himself made aerial photographs, too. Among the photographs yet to be digitized are hundred stereoscopic images. After the First World War Koessler became an architect in Los Angeles. Thanks to crowdfunding his great-grandson could publish the large format book Walter Koessler 1914-1918: The personal photo journal of a German officer in World War I with some of the aerial photographs.