The digital project Transcribathon Europeana 1914-1918 is an initiative of the platform Europeana. In this crowdsourcing project the general public is invited to transcribe letters, postcards and diaries or to annotate pictures within the digital collections at Europeana 1914-1918. On this multilingual website some 50,000 items have been prepared for transcribing or annotating. There are tutorials in nine languages. You can start working with items after registration. There is a educational section for using this project in schools. You can choose items from an interactive maps, browse for items in a particular language or focus on a particular topic. Each year a number of transcribathons (transcribing sessions) are held in European cities.
The World War I Collection: Posters has been created by the Hoover Institution at Stanford University. This digital collection contains 12,300 posters published in the United States, the United Kingdom, Germany, Poland and Russia, Italy, Austria, Canada and Hungary, to mention here only the countries with more than 100 posters in this collection. The size and variety of this collection is extraordinary. There are several filters to make a selection (e.g. country of origin, language, creator) and you can set the time period. For 1914-1918 there are some 10,600 items. The results can be viewed in a list or in a grid. It is possible to create a user account, to save your search questions and create your own collections. This collections can only be viewed with an English interface.
The digital collection World War I: Declarations of War from Around the Globe has been created by the Law Library of the Library of Congress, Washington, D.C. The collection brings you some twenty declarations of war declared between 1914 and 1918, and additional documents, in particular concerning the American involvement. In some cases the documents are taken from source editions, in other cases you can see the official publication in national gazettes or special proclamations.
You can find more collections of the Library of Congress concerning the First World War at its topical portal.
The digital collection World War I Postcards from the Bowman Gray Collection has been created by the library of the University of North Carolina at Chapel Hill. The collection contains some 6,400 postcards from the main belligerent countries (United Kingdom, France, Germany, Belgium, Russia and Italy), but also from other countries. The sheer number of postcards in this collection is equivalent to the number of interesting subjects, for example cavalry or children. Some commercial series, too, are completely present. You can browse the collection in its entirety (530 records with often multiple items), choose among the subjects, names and places, or use the free text search. The general introduction to this collection gives also a succinct bibliography on the subject of First World War postcards.
The digital collection Western European Theater Political Pamphlet Collection 1894-1918 has been created by Princeton University Library (collection MC 248). The collection contains in 77 boxes items from European countries collected since 1914. Apart from pamphlets in English there are items in French, German, Russian, Italian and other languages. The pamphlets do not only touch upon politics but on many aspects of the First World War and the period immediately before the war. The digitized pamphlets are accessible using an online finding aid. In the left side bar you can click on subjects and time periods which open either an item or a set of items within a record. You can use the general search field for a free text search. It is also possible to view the entire finding aid as a page or to download it as a PDF.
The digital collection Første Verdenskrig: Kort [Maps of the First World War] has been created by Det Kongelige Bibliotek in Copenhagen, the Danish national library. This collection contains some 170 maps made in Denmark during the First World War and during its immediate aftermath. There are seven sections. Four atlases deal successively with the 1921 border between Denmark and Germany (63 maps), the city of Flensburg (9 maps), four statistical maps for the province of South Jutland, and a general atlas of the Great War (20 maps). The other sections contain maps for Africa (2 maps), Denmark (9 maps) and Europe (78 maps). There are also some German and British maps with a clear propagandistic aim.
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.