Let's say you get flung back in time to medieval England,

>without being branded as a witch?
Accusing people of being witches was illegal in medieval Europe

>>3369885
The printing press.

>>3369886
Care to elaborate?

>>3369886
>Accusing people of being witches was illegal in medieval Europe
So was murder but it still happened

>>3369889
The official line of the Catholic Church for most of the medieval era was that witches didn't exist and that anyone accusing someone of being a witch was trying to defame them or was otherwise maliciously plotting against them.

>>3369885

Printing Press
Steam power

In general I would say mechanical inventions, and avoid electricity or chemistry based inventions (assuming you would even be able to replicate those).

Stop basing your Historical knowledge off Cartoons.
>>3369889
Witchcraft was considered nonexistent in Medieval Europe, and believing in it was heretical. The Witchhunts only happened by the Catholic Church for a short time during the Counter Reformation, before being largely stopped. WitchCraft convictions were big with Protestants, who didn't exist in the Middle Ages.

>>3369885
Nuclear weapon

Time to get rid of the Krauts for good

>>3369885
Witch hunt and burning didnt begin before the 17th century. . .

Nitroglycerine