Good Alternatives to Windows Task Manager [closed]
AnVir Task Manager Free is process and startup manager. Remove spyware and optimize performance. Monitor and manage processes, services, internet connections, DLLs, drivers. Descriptions for startup programs and all Windows services. Alerts on new startups.
Icons in tray for CPU usage and disk load. Quick access to last launched programs in tray. Hide windows to system tray.
Automatically change process priority, permanently block undesired processes. Furthermore, comes with an attractive user interface.
A portable version is available here.
Moo0 SystemMonitor lets you keep your eye on system resource usages of your PC. It currently supports 36 kinds of information including CPU, Memory, Network, and detailed HDD usages. Using this software, you may discover what is limiting your system performance in each occasion.
MooO System Monitor is freeware, a portable version is available.
Sysinternals Process Explorer is a good Task Manager replacement, but it's more for, well, processes/services than for system info. It's lightweight; no install needed, just unpack.