In Captain America, HYDRA is shown to have a great deal of advanced technology that was only feasible due to the extremely advanced Cosmic Cube-derived power source. HYDRA's Dr. Zola is credited as designing these weapons and technology. This allowed them to have technology in the '40s that in some cases surpassed modern day technology.
One of the themes of Iron Man 2 was how great a scientist and engineer Anthony Stark's father, Howard was. He manages to invent technology far ahead of his time. We see him in action in Captain America, and he gets access to some of the HYDRA technology through his work with the SSR and later SHIELD.
One of the HYDRA designs that caught my eye were soldiers in suits that cover their whole body. Under each arm is a flame thrower, like the Iron Man Mark I (the suit Stark and Yinsen made while in captivity). The soldier can see via rectangular slits in the facemask that have tinted glass, which reminds me of the Iron Man Mark I's face plate. The Mark I was only possible due to Stark's breakthrough on the ARC Reactor technology when he shrunk it down to a small enough size that he could implant one in his chest. So suddenly he has an extremely advanced mobile power source, much like HYDRA's Tesseract batteries, and the first thing he builds is similar to a HYDRA suit.
Did the Iron Man suit come from HYDRA's technology? Did Stark invent something so similar to HYDRA's technology on his own?