Copilot is a Windows program that emulates the PalmPilot handheld PDA from Palm, Inc.. Copilot has a number of features for accurate emulation of the PalmPilot hardware platform, plus additional features for debugging PalmPilot applications.

Copilot is intended primarily as a developer's tool, although anyone can run Copilot. This means you can, for example, play your favorite PalmPilot game right on your Windows desktop.

Copilot requires Windows 95 or Windows NT, and will not work on Windows 3.x even with Win32s. Copilot is a 32-bit multithreaded program, and Win32s does not support multithreaded applications.