Tools

General

• asciiFLOW
  • Line-based ASCII art tool
• ASCII Text Signature Generator
• Byte-Counter
  • UTF-8 string length & byte calculator
• Cloudshark
  • Online PCAP analysis tool
• Diffchecker
  • Online diff tool
• HTML2TXT
• PACPFIX
• RexExr
• Spam and Open Relay Blocking System (SORBS)
• Text to ASCII Art Generator
• Time Difference Calculator

Security

General

• MXToolbox
• Online Port Scan

Internet Registry

• African Network Information Centre (AfriNIC)
  • AfriNIC WHOIS Query
• American Registry for Internet Numbers (ARIN)
  • ARIN WHOIS Query
• Asia-Pacific Network Information Centre (APNIC)
  • APNIC WHOIS Query
• Latin America and Caribbean Network Information Centre (LACNIC)
  • LACNIC WHOIS Query
• Réseaux IP Européens Network Coordination Centre (RIPE NCC)
  • RIPE WHOIS Query
• ICANN Domain Name Registration Data Lookup

Password Generation

• Correct Horse Battery Staple Password Generator
• Secure Password Generator
• Symantec Password Generator

Digital Media

• Online-Convert
  • Media file conversion

Encryption

• Base64 Encode
• Binary/Hex/Octal Conversion
• Comodo SSL Checker
• Cryptii Modular Conversion, Encoding & Decoding

Linux

• chmod Calculator
• Explainshell
• IPTables Rule Generator

Networking

General

• DNS Trails
  • DNS history database
• DNSViz
  • DNS zone visualization utility
• Subnet Calculator
• Visual Subnet Calculator
• Wireshark OUI/MAC Address Lookup

Looking Glass

• AT&T
• CenturyLink / Level3
• Cogent
• Sprint
• Verizon

Power Status

• ConEd Power
• PSEG Long Island
• PSEG
• Jersey Central Power
• DelMarVa Power
• Georgia Power

Programming

• GitHub
• JSONLint
  • JSON validation tool
• PHP Online Function Tester
• Python Reference Documentation
• ShellCheck
  • bash script validation tool
• SourceLair

Software

• Audacity
  • Open source audio editor
• Common Open Research Emulator (CORE)
  • US Navy developed network emulator
• DynSite Test Tools
• FileZilla
  • FTP server & client utilities
• FreePBX
  • Open source PBX
• FreeSwitch
  • Open source SBC
• GNS3
  • Network emulator
• NMAP
  • Network exploration, security & port scan utility
• Oracle Virtual Box
  • Virtual machine utility
• PuTTY
  • Telnet, SSH, Serial connection utility
• PRTG
  • Network Monitoring Software
• SIPp
  • SIP test tool / traffic generator
• WinSCP
  • SCP, FTP, SFTP, FTPS transfer utility
• Wireshark
  • Packet capture utility

Vendor-Specific

Cisco

• Cisco ACL Analyzer

Broadsoft/Broadworks

• Cisco Broadsoft Xchange Customer Portal

VoIP/Telephony

• FaxZERO
  • Test Fax generation
• The Test Call
  • Call quality test numbers