Power20  
   VIC-20 emulator for the Mac OS. Shareware, fully functional for 10 minutes until registered.
   http://www.auto.tuwien.ac.at/~rlieger/Power20/index.html

Pfau Zeh  
   VIC-20 emulator for Win32 and Linux.
   http://www.classicgaming.com/pfauzeh/

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

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

PCVIC  
   Upgrade your PC to a VIC-20. Runs on MS-DOS, OS/2 or Windows.
   http://wwwhome.cs.utwente.nl/~schooten/software/pcvic.html

The 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/

VICE  
   An Amiga port of VICE.
   http://www.amidog.com/amiga/vice/