Useful of the above? They had sloped armor tanks, they had jets (not that the German ones would have made a difference to them), they had rockets (not that were that useful), and the V-weapons were of no use to the Allies during WW2, they were only important post-war. Really the only thing that was marginally useful was the StG, which wasn't really that big of a deal in total context, even though it was better than the Garand and gave German infantry fire superiority in certain fire fights when the MG42 couldn't weigh in. I'm not even sure what 'other' there would be to insert besides the above. Uboat tech wasn't really necessary to win in the Pacific, chemical weapons weren't used so that's not help, the Allies cribbed German cluster bombs IOTL the Allies were ahead in electronics, cannon technology wasn't that big of a deal to copy, AFV tech wasn't improved by choice rather than lack of Allied developments on that front. Really I cannot think of anything that was really that significant other than say Panzerfausts, but the Allies developed the Super Bazooka that made them just as effective as the Panzerfaust, but reusable (just not introduced before the end of the war). Pretty much other than a few areas that weren't useful to the Allies to defeat Germany or Japan the Wallies were ahead of or equal to the Axis in most areas.