SentryPC
With SentryPC you can now restrict and monitor your computer allowing access to what you want when you want for all users! Specify the hours, the days, and total usage time for virtually every aspect of your computer including specific programs, websites, and basic computer and Internet usage! ... Use it as a parental control tool for your children, for your business, public computer access, or virtually anywhere you wish to control computer usage! ... SentryPC can also monitor and record all keystrokes, website visits, windows interacted with, chat conversations, and even applications used.
http://sentrypc.com/SPCDemo.zip - 2Mb - Download - Screenshot

SimpleActivityLogger
SimpleActivityLogger is a small DLL that hooks into Windows and records the following events: * System Startup & Shutdown * User Logon & Logoff * Console Lock & Unlock * Screen Saver start & stop There is a also a small GUI application to allow the user to specify what events are logged and to... It is also useful for tracking the usage of a shared computer, including checking for unauthorised usage. ... SimpleActivityLogger is most useful for people who need to track their computer usage during the course of a day for billing purposes, where system startup & shutdown and/or logon & logoff...
http://www.coruscant.ltd.uk/files/SAcLog11.exe - 247Kb - Download - Screenshot

UserTime
UserTime is software for recording and analyzing the time you spend on your computer. It runs in the background and tracks the time each user has been logged on as well as the time they have been actively using the computer. You can view usage history as a quick summary or by viewing or printing... Some practical applications for UserTime include: - Keeping track of your personal computer time - Help prevent too much wasted time on chat-rooms or games - Help your children establish boundaries regarding time on the computer - Record the time you spend on different projects - Help allocate...
http://www.usertime.com/downloads/utime.exe - 4Mb - 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

EF System Monitor
What the EF System Monitor is and what you can do with it: * A comprehensive tool which provides you with a permanent record of information like memory space, hard disk usage, date, time, user name, etc. about all the computers running on your network. ... * The EF System Monitor can not only show you the data from your local computer, but can do much more: With the EF System Monitor Server (included in the package) you can collect and display the data from remote computers such as a TCP/IP network.
http://www.efsoftware.com/sw/efsysmon.zip - 896Kb - Download - Screenshot

System Eye
System Eye is a manager of system resources. The program shows usage of the main parameters of your computer - the processor, operative and virtual memory, and also a swap file. Therefore you can always watch its productivity, control too exacting applications, quickly find not responding... Starting the huge application, switch on a mode of the dynamic diagram, and you will see, how loading of your computer was changing during work time. ... Also, System Eye has the unique mechanism, which itself will keep up resources usage and in case of an overload will restore high performance.
http://www.globalclipboard.com/systemeye/syseye.exe - 440Kb - Download - Screenshot

Access Manager for Windows
Access Manager for Windows allows you to restrict access to to key features of Windows, such as Control Panels or Start menu, network, Taskbar, desktop, system tray, Network Access Control Page, Control Internet usage and more. It can also disable the Ctrl+alt+delete keys, the function keys at... This program can lock your computer and ask for a password when Windows loads. ... This is simply fantastic! ... Very easy to use and very good documentation. ... Download this now! ... It has all the needed features to keep people from viewing or changing what you do not want them too.
http://www.softstack.com/download/accmen.zip - 913Kb - Download - Screenshot

System Monitor
System Monitor is designed to monitor Microsoft Windows computers on a network. It can monitor the usage of CPU, Memory, Disk Drives and Network Adapters and notify you when a certain resource exceeds a certain value. You can set it up to log events and create usage reports to databases located... By adding rules that will be triggered when certain conditions are met for a specified resource on a computer, you can have notifications sent through email, visually presented or use the Microsoft Text-To-Speech to hear them spoken out loud.
http://www.towodo.com/products/systemmonitor/SM-Setup.exe - 861Kb - Download - Screenshot

Golden Cafe Manager Internet Cafe Software Server
Internet & Cyber Cafe Software by Golden Café Manager is designed for owners of Internet cafes or any other institutions that need to control, charge for, and report on the usage of computers for Internet or gaming access. It provides you with a complete billing system with the ability to adjust... In addition, it tracks the amount of money each computer takes in, and generates detailed sales reports that enable you to monitor individual computer usage. ... A customer can pay in advance and use a computer (immediate prepaid session); open a prepaid account or purchase a timecode and use...
http://www.cyberleader.net/download/cl_package.exe - 7Mb - Download - Screenshot

CountYourTime
Have you ever asked yourself how much time do you usually spend on working, playing games or running entertainment programs when sitting near PC? Count Your Time is a small but very useful software tool that lets user estimate the time spent on working with a computer. ... Moreover, you may view usage statistics history for all programs or select one to view usage history. ... Program gathers and analyzes usage statistics for the added programs and shows usage history for the last day, week, month or any specified time period.
http://countyourtime.com/CountYourTimeSetup.exe - 809Kb - Download - Screenshot