Recommended CTF Tools:

###General

• Linux

  • Kali
  • Ubuntu
  • Other

• Terminal

• Text Editor

  • Vim
  • Sublime
  • Notepad++ for Windows

• Scripting Language

  • Python
  • Ruby
  • Perl
  • Whatever you prefer

###Web

• Web Browser (duh)
  • Dev tools
  • Cookie editor
• Burp Suite (Free version)

###Networking

• Wireshark
• Netcat
• SSH or Putty for Windows

Reversing/Exploitation

• IDA Pro (free version)
• gdb
• GNU binutils: objdump, strings
• foremost
• Hex editor
  • xxd
  • hexedit
  • ghex