EPMon
EPMon - I wrote this program because I like to be able to see the CPU usage percentage at all the time... Here are some key features of "EPMon": showing the system CPU usage in the notification area, showing the CPU usage of a single process, shows the entire file path of the running programs,...
http://www.wapti.com/epmon/index.php - 70Kb - Download - Screenshot

CPU Usage Viewer
This program provides an accurate snapshot of the percentage utilization of the CPU, the technique illustrated works on Windows 95/98/nt/2000/xp/2003. Free, no-nags.
http://www.freesharewarecenter.com/files/cp.exe - 30Kb - Download - Screenshot

SysGraph
Sysgraph is a program that monitors your network speed, RAM and CPU usage. It can optimize memory usage to make other programs run faster. It runs without installation so it keeps your system clean from unnecessary registry entries.
http://w3.enternet.hu/andax2/sgraph11.zip - 250Kb - Download - Screenshot

XPClock Plus
XPClock is a digital desktop clock with a calendar. Very simple interface, plus periodical update skines, chime function, alarm, indication CPU usage. Ver. 1. 70 - transparent calendar (Only full version), sticking to edges of screen, new skins. Ver. ... Features: low level CPU usage, periodical update skins. ... 72- work of function {Set time from Internet} is changed, functions are added: fast start notepad and calculator ({Notepad}, {Calculator}.
http://www.arialit.com/xpclkplus.zip - 1Mb - Download - Screenshot

NfoNak
See how your computer is performing in a variety of different graphical formats. It can also be used as a screen saver. You can monitor such details as memory, disk space, disk usage, CPU usage, internet data rates etc. The graphical formats available are highly customizable and you can mix and...
http://www.nakware.com/nfonak/files/nfonak.zip - 577Kb - Download - Screenshot

TaskInfo
TaskInfo for Win9x/ME/NT/2k/XP is a combination of Task Manager and System Information. Show most of the processes that are often invisible such as keyloggers and so on. Provides real time info on all processes and threads including System threads. Shows TCP/IP Connections. ... It also shows System wide info: CPU, Memory, Cache usage, Data rates for Disk, Network, DialUp IO, VPN IO, IP Address, and more. ... For each process, it shows CPU usage, scheduling, path, open files, memory, DLLs, command line, environment variables, and more.
http://www.iarsn.com/taskinfo/tskinf62.exe - 1Mb - Download - Screenshot

PRTG - Paessler Router Traffic Grapher
PRTG Traffic Grapher is an easy to use Windows application for monitoring and classifying bandwidth usage. It provides system administrators with live readings and long-term usage trends for their network devices. PRTG is mainly used for bandwidth usage monitoring, but may also be used to... All common methods for network usage data acquisition are supported: SNMP: Simple Network Management Protocol is the basic method of gathering bandwidth and network usage data. ... It can be used to monitor bandwidth usage of routers and switches port-by-port as well as device readings like memory, CPU...
http://download2.paessler.com/download/prtg.zip - 10Mb - Download - Screenshot

WinProcesses
WinProcesses is an easy-to-use utility which allow you to view a lot of information about processes: process' threads, process' modules and many other usable information. Also it shows CPU usage history for every process and for whole system.
http://www.dfegame.com/winprocesses/winprocessessetup.exe - 465Kb - Download - Screenshot

XR SNMP Tools
XR SNMP Tools is a set of high performance tools for monitoring network SNMP manageable devices. XR SNMP Tools monitors the Network Health as well as many other network parameters like bandwidth usage, error and collision rates, memory and CPU usages. ... The most common usage is real-time network monitoring of WAN and LAN networks, but you can also monitor many other aspects of managed switches, printers, and other network components as long as they are SNMP enabled. ... It uses a client server architecture that lets you connect to the server from any other workstation in your network,...
http://www.xratel.com/dload/snmp/xr_snmp_tools.exe - 8Mb - Download - Screenshot

BySoft FreeRAM
BySoft FreeRAM 4. 0 is freeware memory manager program that defragments and reclaims memory from the operating system and leaking applications and dlls. This decreases load time and boosts application performance. Features: - Easy to use - Optimize memory manually or automatically - Flushes... 80%) - See real time chart of available memory and CPU usage - Automatically or manually tunes system file cache - Skin support - Uses system tray - Freeware!
http://www.bysoft.com/dl.php?file=FreeRAM32.exe - 494Kb - Download - Screenshot