This site has some wonderful resources on the First World War. Photos, Poetry, Podcast, and much much more. Most, if not all of the material here are free to use since they should be in the public domain.in reference to:
"The First World War Poetry Digital Archive is an online repository of over 7000 items of text, images, audio, and video for teaching, learning, and research.
The heart of the archive consists of collections of highly valued primary material from major poets of the period, including Wilfred Owen, Isaac Rosenberg, Robert Graves, Vera Brittain, and Edward Thomas. This is supplemented by a comprehensive range of multimedia artefacts from the Imperial War Museum, a separate archive of over 6,500 items contributed by the general public, and a set of specially developed educational resources.
Freely available to the public as well as the educational community, the First World War Poetry Digital Archive is a significant resource for studying the First World War and the literature it inspired."
- Welcome | First World War Poetry Digital Archive (view on Google Sidewiki)