Greeting's

2 very helpfull senior member's told me following GOLDEN rules for making a mark in security industry :

LEARN TCP/IP
LEARN HOW THE OS WORKS
LEARN HOW *FEATURES* CAN BE EXPLOITED.


oh and you wanted 3 tools (i couldnt find any 3) but here is a list of 75 :

The list is old but is a great place to start off :

http://www.insecure.org/tools.html