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witr (Why Is This Running) is an open-source Linux process tracing tool that traces startup chains from processes, ports, containers, or files to quickly identify whether a process was launched by systemd, cron, or supervisor.

RuView is a Rust-based open-source project that uses commercial WiFi CSI signals for real-time spatial awareness, presence detection, and vital sign monitoring — no cameras needed. 76,500+ GitHub stars.