BlackArch Linux is a Arch-family Linux distribution based on Arch Linux. The cyber-weapon encyclopedia — an Arch-based pentesting powerhouse with over 2,800 tools.
Strengths: Largest repository of security tools on any operating system; Can be installed on top of existing Arch Linux with 2 commands; Minimalist tiling and lightweight window managers. Trade-offs: ISO download is massive (>15GB); Not suitable for non-security professionals.