1.Password Cracking Tools:
a) John the ripper-http://www.openwall.com/john/
b) THC hydra-http://www.thc.org/thc-hydra/
c) Brutus-http://www.hoobie.net/brutus/
d) L0PhtCrack-http://www.l0phtcrack.com/
e) SAMInside-http://insidepro.com
f) Cain and abel-http://www.oxid.it/cain.html
g) Pwdump-http://www.foofus.net/fizzgig/pwdump/
2.Pentesting Tools:
a) Metasploit framework- http://www.metasploit.com/
b) Canvas- http://www.immunitysec.com/products-canvas.shtml
3.Sql injector Tools:
a) Sqlihelper
b) Havij
c) SQL Exploiter
4.Website Vulnerability Scanner:
a) Acunetix- http://www.acunetix.com/
b) Rational appscan- http://www.ibm.com/software/awdtools/appscan/
5.Vulnerability Scanner:
a) Nessus-http://www.nessus.org/
b) Retina-http://www.eeye.com/html/Products/Retina/index.html
c) Sara-http://www-arc.com/sara/
6.Port Scanner:
a) Nmap- http://nmap.org/
b) Angry Ip scanner- http://www.angryziber.com/ipscan/
c) Super Scan- http://www.foundstone.com/us/resources/proddesc/superscan.htm
7.Intrusion detection Tools:
a) Snort-http://www.snort.org/
b) Sguil-http://sguil.sourceforge.net/
8.Live CDs:
a) Ophcrack- http://ophcrack.sourceforge.net/
b) Backtrack- http://www.backtrack-linux.org/
c) Hiren’s boot cd- http://www.hiren.info/pages/bootcd
d) Ultimate boot cd- http://www.ultimatebootcd.com/
9.Wireless Tools:
a) Wireshark- http://www.wireshark.org/
b) Kismet-http://www.kismetwireless.net/
c) Aircrack- http://www.aircrack-ng.org/
d) Netstumbler- http://www.stumbler.net/
10.Steganography Tools: A list of few "STEGANOGRAPHY TOOLS " free to DOWNLOAD.
11.IP Tracing Tools:
a) Neo Trace- http://www.networkingfiles.com/neotrace/
b) Visual Trace-http://www.visualiptrace.com
12.Software Cracking Tools:
a) Debuggers-OllyDbg,WinDbg
b) Unpackers-QUnpack
c) DisAssemblers-WIN32Dasm
d) Decompilers-Boomerang,Mocha,JAD
e) Hex Editors-Hexworkshop,Hview, HxDSetupEN
A list of few "REVERSE ENGINEERING" tools free to Download.
13.Virtual Enviroment Software:
a) Vmware- http://www.vmware.com/
b) Virtual box- http://www.virtualbox.org/
c) Sandboxie- http://www.sandboxie.com/
a) John the ripper-http://www.openwall.com/john/
b) THC hydra-http://www.thc.org/thc-hydra/
c) Brutus-http://www.hoobie.net/brutus/
d) L0PhtCrack-http://www.l0phtcrack.com/
e) SAMInside-http://insidepro.com
f) Cain and abel-http://www.oxid.it/cain.html
g) Pwdump-http://www.foofus.net/fizzgig/pwdump/
2.Pentesting Tools:
a) Metasploit framework- http://www.metasploit.com/
b) Canvas- http://www.immunitysec.com/products-canvas.shtml
3.Sql injector Tools:
a) Sqlihelper
b) Havij
c) SQL Exploiter
4.Website Vulnerability Scanner:
a) Acunetix- http://www.acunetix.com/
b) Rational appscan- http://www.ibm.com/software/awdtools/appscan/
5.Vulnerability Scanner:
a) Nessus-http://www.nessus.org/
b) Retina-http://www.eeye.com/html/Products/Retina/index.html
c) Sara-http://www-arc.com/sara/
6.Port Scanner:
a) Nmap- http://nmap.org/
b) Angry Ip scanner- http://www.angryziber.com/ipscan/
c) Super Scan- http://www.foundstone.com/us/resources/proddesc/superscan.htm
7.Intrusion detection Tools:
a) Snort-http://www.snort.org/
b) Sguil-http://sguil.sourceforge.net/
8.Live CDs:
a) Ophcrack- http://ophcrack.sourceforge.net/
b) Backtrack- http://www.backtrack-linux.org/
c) Hiren’s boot cd- http://www.hiren.info/pages/bootcd
d) Ultimate boot cd- http://www.ultimatebootcd.com/
9.Wireless Tools:
a) Wireshark- http://www.wireshark.org/
b) Kismet-http://www.kismetwireless.net/
c) Aircrack- http://www.aircrack-ng.org/
d) Netstumbler- http://www.stumbler.net/
10.Steganography Tools: A list of few "STEGANOGRAPHY TOOLS " free to DOWNLOAD.
11.IP Tracing Tools:
a) Neo Trace- http://www.networkingfiles.com/neotrace/
b) Visual Trace-http://www.visualiptrace.com
12.Software Cracking Tools:
a) Debuggers-OllyDbg,WinDbg
b) Unpackers-QUnpack
c) DisAssemblers-WIN32Dasm
d) Decompilers-Boomerang,Mocha,JAD
e) Hex Editors-Hexworkshop,Hview, HxDSetupEN
A list of few "REVERSE ENGINEERING" tools free to Download.
13.Virtual Enviroment Software:
a) Vmware- http://www.vmware.com/
b) Virtual box- http://www.virtualbox.org/
c) Sandboxie- http://www.sandboxie.com/
tuy nó đơn giản vậy nhưng nó giúp bạn tránh được những trận tấn công local attack từ những kẻ tấn công và bảo vệ website bạn khỏi những kẻ tấn công vì mục đích xấu 
