Artifex
   A freeware C16 and Plus/4 emulator for Windows.
   http://artifex.emuunlim.com/

C16-Plus4 Retro Page
   Game downloads, computer history, tips and home of YAPE, A freeware C16 and Plus/4 emulator for Windows. An older open source version for Unix/SDL is also available.
   http://yape.homeserver.hu/

Minus4
   A freeware Plus/4 emulator for DOS, Java, and Windows. The Source Code for the Windows version is also available.
   http://javalemmings.com/minus4/

WinEMU
   A freeware C16/Plus4 emulator for DOS and Win32 platforms. Also contains game cheats and a developer section.
   http://winemu.emuunlim.com/

plus4emu
   An open source emulator for Linux, MacOS, and Windows.
   http://plus4emu.sourceforge.net/