interpreters:

java
C++
C
C#
objective C
python
BASIC
Fortran
PHP
Perl
Ruby (on rails)
notepad++
CSS
SQL

Pentesters:
wireshark
metasploit
sql map
John the ripper
Nmap
hydra
cain and abel
superscan
brutus
burpsuite
maltego
aircrack-ng
kismet
nemesis
tcdump

Browsers:
Chrome
Tor
blur
witopia
strongVPN
other various proxys

Miscellanious:

SSH
PGP