The Ancient Aliens episode "Aliens and the Third Reich" is a great resource for this topic.
I watched it yesterday and picked up alot of good quality information from it.
* In 1936 a crash occurred in Germany's Black Forrest. It's said that a disc shaped object and non human occupants were recovered by the authorities and taken to a secure castle location. The intent was to reverse engineer the technology.
* Viktor Schauberger conducted advanced engine research. Possibly anti-gravity. He developed a device that used liquids like water or Mercury in a vortex machine. This device would pull the craft along instead of being pushed by conventional engines; this would give the flying craft a signifigant advantage.
* Vimmanas of ancient India are said to be powered in a similar way as Schauberger's vortex engine.
* The Swastika is a sandskrit word dating back to India 3,000 years ago and translates into "Good fortune." The Hindu God Brahma is said to be connected to the Swastika which is said to have extraterrestrial connections.
* The Vril Society had members such as Deputy Fueher Martin Borman, Luftwaffe commander Hermann Göring, and Reichsführer of the SS Heinrich Himmler. People were brought into the society by Himler who could apparently speak to aliens.
* Vril Energy is said to be powerful. Enough to power machines.
* The Nazi believers claimed that the Aldebaran Star System was were the ancestors of the Germans came from. This alien race called themselves Aryans.
* Hermann Oberth, a physicist and engineer said "We were helped by people from other worlds."
* Brahmastras are said to come from blue skinned Gods. They are written about in sandskrit writtings from India.
* Werner Heisenberg a German theoretical physicist discovered fission in 1936.
* The Germans were close to building an atomic bomb, but then stopped. Resources problems are one possibility. Another is that they found a better way. Something that would travel through time and space.
* In a remote valley in Vicavich Polland is The Flytrap, also known as The Henge. This is said to have been used by the SS. One explanation is a coal mine. Another is the location of the experiment known as "The Bell."
* The Bell was electromagnetic. It's said that the device could have changed the course of the war. Even as the Soviets were closing in. Some called it a time machine.
* Hans Coler was planning to defect but dissapeared. Possibly to another planet or time.
* A UFO was seen over Hamburg. Martin Borman and Maria Orsitsch are said to have dissapeared. Possibly leaving for another world. Orsitch sent out psychic messages to other about post-war plans.