The sys-filesystem library provides a cross-platform interface for gathering filesystem information, such as disk space and mount point data.

The sys-proctable library provides an interface for gathering information about processes on your system, i.e. the process table. Most major platforms are supported and, while different platforms may return different information, the external interface is identical across platforms.

The solaris-kstat library provides a Ruby interface for gathering kernel statistics from the Solaris operating system. Each matching statistic is provided with its module, instance, and name fields, as well as its actual value.