The digital collection WWI Military Portraits is part of the digital image collections of the Milwaukee Public Library. The collection contains 33,000 items (photographs, typewritten volumes, and service records). There are some 6,000 photographs. The items were complied from collections of the American War Mothers Milwaukee County Chapter and the Milwaukee County Council of Defense. You can browse all items, filter the results using the free text search or using the subject filter. In the advanced search mode you can add search fields at will. Some items refer to the Canadian and Polish armies.
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 portal Wielka Wojna: Polish archives and the Great War has been created by the Naczelna Dyrekcja Archiwów Pánstowych, the National Direction of Polish State Archives. Its core is an list of virtual exhibitions and/or activities in Polish state and city archives, organized by year, with 2014 on the top. You have to scroll down to find the most recent items. There is a page for new publications by Polish archives, a page for conferences and similar events, and a similar list for other projects, and also a page about themes concerning the First World War. Alas there are not for all items in these lists links. The portalsite can only be viewed in Polish.
The digital collection World War 1914-1918 has been created by the university library of the Jagiellonski University in Cracow, Poland, as a part of its digital library. This digital collection contains 700 works. You can view the books in alphabetical order by title, search using the free text search field or using the advanced search. The collection contains works in Polish, German and other languages. Beside books there are sixty pamphlets, two atlases and a few maps and posters. The interface of this digital collection can be viewed in Polish and English.
The digital version of the Kriegstagebuch Fritz Schilling 1914-1918 has been created by his granddaughter Kerstin Schilling. During the First World War Fritz Rudolf Schilling (1891-1942) served with the Berlin Corps Fernsprechabteilung, a communication unit of the German Army, both at the Russian front and in France. The diary with mostly brief entries is published in blog fashion, interestingly one month in each post. Some photographs and maps have been added to the entries. This diary can be viewed only in German.
The digital collection Maueranschläge (Wall ordinances) has been created by the Landesarchiv Baden-Württemberg. After the First World War the German Heeresarchiv (Army Archive) started to collect ordinances posted by the German army and military government, now held at the Hauptstaatsarchiv Stuttgart, series J 151. Some 2,500 of the 2,700 digitized ordinances stem from the First World War. They touch in particular Belgium and France, but also the Habsburg Empire and countries in Eastern Europe such as Poland, Russia and Rumania. For Belgium the ordinances were published in three languages (German-French-Dutch), for France in French and German. Some posterlike ordinances are clearly meant for propaganda aims and are quite colourful. You can browse the digitized images using the Bildexplorer, you can search images freely using the Volltextsuche, or search systematically using the tree structure of the Strukturansicht.
The Landesarchiv Baden-Württemberg organizes exhibitions concerning the First World War with the general theme 1914-1918. Erlebt, erlitten, erinnert [1914-1918. Lived, suffered, remembered] in Karlsruhe, Freiburg, Stuttgart and Sigmaringen.
The digital collection La Grande Guerra 1914-1918: I diari raccontano [The Great War 1914-1918: The diaries speak] has been created by the Archivio diaristico nazionale in Pieve Santo Stefano and the newspaper L’Espresso. This collection contains excerpts and sections from currently some 140 diaries written by men and women, both civilians and people enlisted in the Italian army during the First World War. They write about their experiences both in Italy and elsewhere, in particular in the Habsburg empire and the Balkan, but also for example in Germany and Poland. You can select authors (autori), themes (temi), and events and locations of war (eventi e luoghi bellicii). You can also use the free text search. The public is also invited to contribute to the collection by bringing diaries to the attention of the project. The collection is accessible in Italian.