These guys have done an amazing job bringing dozens of photos to life with colour. Here are some of the aviation related ones, if you enjoy them I would recommend a visit to their webpage.
Albatros DIII D 2062-16. Western Front, 3 March 1917
This plane belonged to Karl Emil Schäfer of Jasta 11, it came down on the German side of the Lines when his gun synchronising gear malfunctionned and partially damaged the airscrew. [more info at the site]
Two crewmen standing in the forward defensive machine gun position on top of a German Zeppelin
Often freezing cold, always vulnerable, the defensive gunners occupied a tiny, sunken recess on the very top of the airship, shielded from the buffeting winds only by a shallow screen and their thick leather flying suits.
1st of April 1918. British and Canadian Observers and Pilots of No. 22 Squadron RFC with a Bristol F2b at Vert Galant aerodrome, which was situated about 12 miles north of Amiens. Each of them had brought down at least three German aircraft. (As far as we can tell, all but two of these men survived the war.)
A selection of earlier posts depicting German Aces and their flying machines.
Savy, Nord Pas de Calais, 22nd, October 1917. An unidentified member of the 69th Australian Squadron, later designated No. 3 Australian Flying Corps (AFC), fixing incendiary bombs to an R.E.8 aircraft at the AFC airfield north west of Arras.
[re-creation from a museum?] ".....in Sep 1918 when attacking German aircraft over the Cambrai sector a member of his formation collided with him buckling his starboard upper wing and forcing him into a dive. After his aircraft had lost about 5000 feet of height the dive gradually developed into a right-handed semi-flat spin. At about 2000 feet Caldwell climbed out of his cockpit, placed his left foot on the lower port mainplane and, grasping the port centre strut with his left hand endeavoured to balance his aircraft, flying it with his right hand and foot. Displaying skill and resource of the highest order he succeeded in guiding his crippled aircraft so that it just cleared the front line trenches and, just as it was about to crash, he jumped off and turned a few somersaults on the ground. He then stood up, brushed himself off and walked to the nearest trench asking to use the telephone."