Useful tools for CTF(Infosec)

I've selected useful and must-have tools for CTF games and computer security competitions. Most of this tools are often indispensable during the games (especially task-based/jeopardy CTF games).

I've combined tools by categories just like in CTF games: Reverse, Steganography, Networking, Forensics, Cryptography, Scripting.

Most of tools are cross-platform, but some of them are only for Windows or Linux. 

Reverse Engineering:

• GDB - http://www.gnu.org/software/gdb/download/
• IDA Pro - https://www.hex-rays.com/products/ida/support/download.shtml
• Immunity Debugger - http://debugger.immunityinc.com/
• OllyDbg - http://www.ollydbg.de/
• radare2 - http://www.radare.org/y/?p=download
• Hopper - http://www.hopperapp.com/download.html
• nm - unix/linux tool
• objdump - linux tool
• strace - linux tool
• ILSpy - http://ilspy.net/
• JD-GUI - http://jd.benow.ca/#jd-gui-overview
• FFDec - http://www.free-decompiler.com/flash/download.html
• dex2jar - http://code.google.com/p/dex2jar/
• uncompyle2 - https://github.com/wibiti/uncompyle2

Hex editors:

• Windows:
• HxD - http://mh-nexus.de/en/hxd/
• Neo - http://www.new-hex-editor.com/hex-editor-downloads.html
• Linux:
• Bless - http://home.gna.org/bless/downloads.html
• wxHexEditor - http://www.wxhexeditor.org/download.php
• Exe unpackers - Unpacking Kit 2012 - http://forum.exetools.com/showthread.php?t=13610

Networking:

• Wireshark, tshark - https://www.wireshark.org/download.html
• OpenVPN - https://openvpn.net/
• OpenSSL - https://www.openssl.org/related/binaries.html
• tcpdump - http://www.tcpdump.org/
• netcat - http://netcat.sourceforge.net/
• nmap - http://nmap.org/download.html
• HTTP:
• Live HTTP - https://addons.mozilla.org/En-us/firefox/addon/live-http-headers/ (Firefox Add-on)
• Tamper Data - https://addons.mozilla.org/En-us/firefox/addon/tamper-data/ (Firefox Add-on)
• CapTipper - https://github.com/omriher/CapTipper

Steganography:

• OpenStego - http://www.openstego.info/
• OutGuess - http://www.outguess.org/download.php
• SilentEye - http://www.silenteye.org/download.html
• Steghide - http://steghide.sourceforge.net/download.php
• StegFS - http://sourceforge.net/projects/stegfs/
• pngcheck - http://www.libpng.org/pub/png/apps/pngcheck.html
• GIMP - http://www.gimp.org/downloads/
• Audacity - http://audacity.sourceforge.net/download/
• MP3Stego - http://www.petitcolas.net/steganography/mp3stego/
• ffmpeg (for video analysis) - https://www.ffmpeg.org/download.html

Forensics:

• dd - unix/linux tool
• strings - unix/linux tool
• scalpel - https://github.com/sleuthkit/scalpel
• TrID - http://mark0.net/soft-trid-e.html
• binwalk - http://binwalk.org/
• foremost - http://foremost.sourceforge.net/
• ExifTool - http://www.sno.phy.queensu.ca/~phil/exiftool/
• Digital Forensics Framework (DFF) - http://www.digital-forensic.org/download/
• Computer Aided INvestigative Environment (CAINE) Linux forensics live distribution - http://www.caine-live.net/
• The Sleuth Kit (TSK) - http://www.sleuthkit.org/sleuthkit/download.php
• Volatility - http://code.google.com/p/volatility/

Scripting / PPC (Professional Programming and Coding):

Text editors:

• Sublime Text - http://www.sublimetext.com/
• Notepad++ - http://notepad-plus-plus.org/
• vim - http://www.vim.org/
• emacs - http://www.gnu.org/software/emacs/

Crypto:

• Cryptool - https://www.cryptool.org/
• hashpump - https://github.com/bwall/HashPump
• Sage - http://www.sagemath.org/
• John the Ripper - http://www.openwall.com/john/
• xortool - https://github.com/hellman/xortool
• Online tools:
• http://www.crypo.com/
• http://www.cryptool-online.org/
• http://rumkin.com/tools/cipher/

• Modules for python - pycrypto - https://www.dlitz.net/software/pycrypto/

Source: http://delimitry.blogspot.ca/2014/10/useful-tools-for-ctf.html