A sledgehammer. We had used it once to bypass sophisticated electronic lock on the door to our accountant office when she forgot password.
Also I can recommend a fireaxe which we used to hack a new window.
The best and far the most used language used for Hacking is C or C++ as they have extremely Low Level control as well as higher level functionality.
Many of the famous Hacking tools are programmed in C. Of course how can I forget Pearl. As it is very easy to use to hack\ penetration testing.
I really, hope you not to use these for unethical purposes considering many of those Authors got arrested quite quickly but only the very minor amount of people managed to escape. I can already say that you are not those minority.
@miinpaa, that reminds me of a Terry Pratchet book, the world uses castle towers with a grid with fires and shutters in to communicate lots of messages at once over huge distances, hackers would hack every one in them to pieces and send their own messages XD
I think eastern Europe in general has relatively lax (or poorly-enforced) laws on computer crime. I remember my ex-girlfriend, who is Serbian, telling me that companies like eBay don't deliver to Serbian addresses because of rampant credit card fraud or something like that, and in order to get eBay deliveries sent to Serbia, some Montenegrin friends of hers (she would always refer to them as "hackers from Montenegro") would change the address from Serbia to Montenegro, but keep the rest the same, and it actually got delivered. I'm not sure if that story was true or not, but anyway, the point is I think in the former Soviet bloc and former Yugoslavia, there is generally a lot of computer crime and hacking and such. Some of the association probably comes from Soviet hacking during the cold war, as well as things like the cyber-attacks during the South Ossetia war.