phpSysInfo is a customizable PHP Script that parses /proc, and formats information nicely. It will display information about system facts like Uptime, CPU, Memory, PCI devices, SCSI devices, IDE devices, Network adapters, Disk usage, and more.
This Nagios plugin allows to remotely monitor Windows hosts in a AGENTLESS fashion. Technically it is using the Win32 API from a Windows proxy server to the remote host. Syntax and feature wise it mirrors NSClient++ (CPU, RAM, Disk, Svc, Proc., etc)