SysGauge (Portable 64-bit) v2.6.18

SysGauge is a Swiss army knife System Information utility that can retrieve all kinds of information about your system.

You can use it to monitor CPU usage, memory usage, network transfer rate, operating system performance, the status and resource usage of running processes, file system performance, USB performance, disk space usage, disk read activity, disk write activity, disk read transfer rate, disk write transfer rate, disk read IOPS and disk write IOPS for individual logical disks or all physical disks installed in the computer.

The utility can display various types of informative charts and information that can be exported to different types of formats.

SysGauge also allows one to connect to remote computers and monitor the CPU usage, memory usage, network transfer rate, disk space usage and disk activities via the network.

Best of all, the developer has made it available for free.