Alternatives to FSMonitor

Displays all open files and sockets in use by all running processes

System monitor for the menu bar

Git interface focused on visual interaction

System monitoring app

Keep your recently modified files at hand and up-to-date

Tool to explore all the running tasks (processes)

Analysis tool for security research and malware triage

Monitor filesystem activity

Disk utilisation visualiser

Set of CPU, memory, disk, and network monitoring tools

SQL powered operating system instrumentation and analytics

Graphically shows disk usage within a file system