I often write one-off utilities or test applications for personal use and am collecting some of them here. Please note that all of the utilities are available with source code, comments, etc.

• ISBN Linker - A JavaScript utility to convert an ISBN into URLs/images.
  
• ListCompressed - A utility to list compressed folders.
• Movefile - A utility that's mainly used to move or delete files that are locked up by a process.
• Scandf - A utility to scan for files corrupted by Microsoft's KB920958 update for Windows 2000 SP4.
• SetConsoleMode(), ReadConsoleInput(), and mouse events - A note about some poorly documented, or undocumented, Windows functions.