| Blackout Monitor | | System tray application for Windows that warns Southern California Edison customers of impending rolling blackouts. |
| BMP EMF Grapher | | A 2-D mathematical package that exports to BMP, EMF, CSV and imports to CSV. |
| Bret Johnson | | DOS TSR (Terminate/Stay Resident) keyboard and screen utilities . Some can also be used in Windows. Source Code is available for most. |
| Burn to the Brim | | Windows Utility which takes the group of files or directories and selects those which optimally fill a cdr. |
| Calculator | | Windows utility that lets you add, subtract, divide, and multiply. |
| Calendar Magic | | A program that compares 23 different calendar systems and other calendar related tools. |
| CamStudio | | Records screen activity from the Windows desktop into standard AVI movie files. It is an ideal tool for creating software demonstrations and active presentations. [Freeware/Opensource] |
| CCleaner | | A simple program that removes unused and temporary files from Windows machines. |
| CDOrg | | A program that helps sort CD into various different categories. Requires .NET runtime. [Win32] |
| Chris Oldwoods Stuff | | Various network and database tools for Windows, DOS and Java. Source and binaries available. |
| CircleTool | | Calculates various functions related to circles. [Win32] |
| CJ's Den | | Freeware with source code available, by Chad Ross. Offers Webtime, an alarm tool designed specifically for time notification. [Requires .NET runtime] |
| Click-N-Type Virtual Keyboard | | On-screen virtual keyboard for anyone with a disability who can't type on a physical computer keyboard, but can use a pointing device like a mouse. |
| Clickie | | Utility that can add two new features to the right click context menu of Windows Explorer: Copy Path Name, and Open MS-DOS Prompt. |
| ClipDiary | | A utility for tracking the clipboard history. |
| Console Calculator | | A scientific calculator has a UNIX-like interface and many advanced mathematical functions. [Win32] |
| Cosmo's Productions | | Simple computer games, greeting cards, sheet musics and mathematical physics. |
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