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Apps with 'Connectivity Testing' feature

  1. Nmap ("Network Mapper") is a free and open source (license) utility for network exploration or security auditing.

  2. Zenmap is the official cross-platform GUI for the Nmap Security Scanner. It is free and runs on Linux, Windows, Mac OS X, etc. Zenmap aims to make Nmap easy for beginners to use while providing advanced features for experienced Nmap users.