CheckIt series of PC diagnostic programs.

A freeware CPU temperature monitor for Windows using .NET framework. Offers information and downloads.

Laptop/notebook battery diagnostic and repair tool for Windows. Includes product information, FAQ, pricing and demo download.

System analysis utility that helps you diagnose problems on PCs running Microsoft's Windows operating systems. Also provides a native DOS diagnostic program

Manufacturers of PC diagnostic software products for PCs. Products include PC-Technician, PC-Diagnosys and The PC Toolbox Newsletter.

Free memory test program for x86 (PC) computers. Stand-alone diagnostic program that fits on one bootable floppy. Linux and Windows versions available with source code.

Free diagnostics and benchmarking program running on Win32 platforms. Display information on the screen, print it, or save it to file in various formats like HTML, CSV or XML.

Free memory advanced diagnostic utility based on the original Memtest86.

ModemChk makes it easy to check the results of your last connection, for reconfiguring your modem, comparing results, and checking line noise. Click the auto detect button or use the command line options to open and run an AT command of your choice.

PC hardware and software discovery in your web browser. Freeware and corporate licensed versions.