This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
The most popular 8-bit Apple II emus are AppleWin and Apple Oasis, which run under PC Windows, and Apple-PC, which runs under PC DOS and includes support for Mockingboard sound. These programs can turn your PC into an enhanced Apple //e running at least as fast as the real thing using software from virtual disks (disk image files). There are also 8-bit Apple II emus for Macs (one, Catakig, emulates a II, II+, or IIe) and Amiga (Apple 2000). For IIgs emulation, the current speed and compatibility leader is Bernie ] [ The Rescue. Bernie is shareware which runs on the Mac Power PC. The chief competition for Bernie is probably KEGS (v0.82) which runs under Mac OS-X, Win32, Linux, and many Unix's. Another IIgs emu, XGS, runs on PC's and Macs under a variety of OS's including DOS, Windows, and Unix. KEGS/32 and XGS/32 are for PC Windows. Another good looking IIgs emu is Sweet-16 (BeOS). On modern machines, Bernie, XGS, and KEGS do well on benchmarks vis-a-vis an accelerated IIgs. To get some idea of how the GS emus stack up, see the benchmarks comparison chart by Gilles Tschopp in FAQs resource file R026GSEMUS.htm . (This benchmark is a bit old and doesn't include all IIgs emus or take into account improvements to later versions of the emulators listed.) For more emulator information, check out the comp.emulators.apple2 newsgroup and visit some of the emu websites. For details and software relating to a specific emulator see ... Apl2Em ref. ftp://ftp.apple.asimov.com/pub/apple_II/emulators/apple_2_for_windows/ apl2em/ Apple IIe (Macs and PowerMacs) ref. ftp://ftp.apple.asimov.net/pub/apple_II/emulators/IIe/ ref. http://apple2.org.za/gswv/a2zine/Utils/ Apple in PC http://aipc.ods.org/ Apple Oasis Page http://www.geocities.com/SiliconValley/Lakes/4414/A4W.HTM Apple PC (DOS) ref. ftp://ftp.apple.asimov.net/pub/apple_II/emulators/applepc/ setup- http://home.earthlink.net/~evin1/a2war/help.htm#aplpc Apple2000 (Amiga) ref. ftp://ground.ecn.uiowa.edu/apple2/Emulators/ ref. http://wuarchive.wustl.edu/~aminet/misc/emu/index.html Apple2000e (Amiga) ref.http://wuarchive.wustl.edu/~aminet/misc/emu/index.html Applelet Page (Java applet) http://www.fasterlight.com/hugg/projects/applelet.html Applemu (PC DOS) ref. http://apple2.org.za/gswv/a2zine/Utils/ Appler ref. http://www.simtel.net/pub/msdos/emulate/ AppleUni Page http://dr.ea.ms/inside.html ref. ftp://ftp.apple.asimov.net/pub/apple_II/emulators/appleuni/ AppleWin (Three development paths: "Applewin", "Applewin2", "Applewin3") http://www.tomcharlesworth.pwp.blueyonder.co.uk/ -Applewin http://pages.ripco.net/~wizwom/applewin/ -Applewin2 ref. http://apple2.org.za/gswv/a2zine/Utils/ -all current ref. ftp://ftp.apple.asimov.net/pub/apple_II/emulators/applewin/ Bernie (PowerMacs) http://www.bernie.gs/ Catakig Page (Macs and PowerMacs) http://www.radix.net/~cklipsch/ctkgdoc/ Dapple Page (developing II+ and //e emu for DOS PC) http://dapple.sourceforge.net/ Gus (IIgs emu for PowerMacs) ref. http://www.emulation.net/apple2/index.html iGS (XGS-style IIgs emu for Mac OS) ref. http://www.emulation.net/apple2/index.html KEGS (IIgs emu for Mac OS-X, Win32, Linux, and almost any Unix with X11) http://kegs.sourceforge.net/ ref. ftp://ground.ecn.uiowa.edu/apple2/Emulators/ KEGS OS-X Page (Mac) http://www.casaGS.net KEGS32 Page (IIgs emu for Windows PC) http://www.geocities.com/akilgard/kegs32/ M.E.S.S. Page (8-bit A2's on PC and Mac) http://www.mess.org/ Mess ROMs at ... http://pkg.lugbs.linux.it/PACCHETTI/Mess-roms/CONTENTS/www.messroms.de/old/ OSXII Page (Apple //e Emulator for Mac OS X) http://apple2.intergalactic.de/ PsiApple Page: 64k II+ emu on a Psion http://www.fasterlight.com/hugg/projects/psiapple.html Stop the Madness (Mac) ref. ftp://ftp.apple.asimov.net/pub/apple_II/emulators/stm/ Sweet16 for BeOS http://www.sheppyware.net/products/beos/sweet16/ XGS-DOS (PC) Page http://www.casaGS.net ref. http://www.inwards.com/xgs/xgs_resources.html XGS/32 Page http://xgs32.emucamp.com/ XGSMac (68k Macs) ref. http://www.inwards.com/xgs/xgs_resources.html YAE Page http://quark.netfront.net:6502/ ref. ftp://ftp.apple.asimov.net/pub/apple_II/emulators/yae/ By: Mitchell Spector