Although a bit rare in my usage, I have found basic use of lsof quite useful when needed. I haven't even tried many command line options. The options it provide

Although a bit rare in my usage, I have found basic use of lsof quite useful when needed. I haven't even tried many command line options. The options it provides really seem comprehensive. I have also found similar tools on Windows (like WhoLockMe or Process Explorer) quite useful.