Sigar
Sigar, short for System Information Gatherer And Reporter, is a cross-platform software library designed to retrieve low-level system information in a uniform way across different operating systems. It originated with Hyperic, a company focused on IT monitoring, to support its management products. After Hyperic was acquired by VMware in 2009, SIGAR moved into the realm of open-source, community-maintained tooling and became a reference point for portable system metrics.
The library provides a stable API to access a range of metrics, including CPU usage and topology,
Platform support covers major operating systems such as Linux, Windows, macOS, and common Unix variants. Because
Over time, other libraries with similar goals—such as OSHI for Java or psutil for Python—have gained popularity,