Perfmon – Consolidate your favorite CLI monitoring tools into a single TUI (github.com)

Perfmon is an open-source, Go-based terminal TUI that consolidates common CLI monitoring commands (e.g., top, vmstat, netstat) into a tabbed interface. It provides live sparklines for quick system health checks, supports configurable refresh intervals and custom commands via a TOML file, and includes theme toggling plus Linux/macOS defaults.