These sites are archives of Apple II files. They may be in Shrink-It! format for use on real Apple II hardware or in one of the various disk image formats. Some of them are being actively updated. Also check the Emulation page for sites with disk images for use with emulators.

Apple Support Area -  http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/English-North_American/Apple_II/
Apple's official support site. Free downloads of IIGS System Software 6.0.1 and HyperCard GS. This was formerly an FTP site, but seems to be HTTP-only now. The FTP site was mirrored at Planet Mirror.

Asimov FTP Site - ftp://ftp.apple.asimov.net/pub/apple_II/
This large collection of disk images is probably the best known Apple II archive on the net. The site is mirrored at Planet Mirror and ftp://ftp.cuhk.edu.hk/pub/oldies/apple2/. There is now an HTTP mirror at http://www.apple2.org.za/mirrors/ftp.apple.asimov.net/

CalTech Apple II Archive - see TFF Enterprises Apple Software Archive

Chebucto Community Net - http://www.chebucto.ns.ca/Services/PDA/appleII.shtml
Software for the Apple II and IIgs, with descriptions.

EmuAsylum's Apple II Archives - http://www.emuasylum.com/index.php?page=roms&type=list&system=Apple%20II
Over 3000 disk archives of Apple II programs for use with emulators.

Ground Apple II Archive - ftp://ground.ecn.uiowa.edu/apple2/
(Appears to be down, but mirrored at http://www.apple2.org.za/mirrors/ground.icaen.uiowa.edu/ ) This huge Apple II FTP archive at the University of Iowa resides on a 1.7 GB hard drive purchased by donations from users. Also mirrors several other Apple II archive sites in the /Mirrors/ directory.

IIgs Gaming Memory Fairway - See: What Is The IIgs

Planet Mirror - http://public.planetmirror.com/ or or ftp://ftp.au.horde.org/
A site which mirrors many FTP sites. The Asimov site is mirrored at: /pub/apple2/. The Apple Support site is mirrored at /pub/apple/. These are also available at http://public.planetmirror.com.au/...

TFF Enterprises Apple Software Archive -  http://apple2.tffenterprises.com/apple2
Formerly the CalTech Apple II Archives, this second largest archive of Apple II public domain and shareware on-line is administered by Daniel M. Zimmerman. FTP access is available at: ftp://apple2.tffenterprises.com/pub/apple2. A HTTP mirror is at http://www.apple2.org.za/mirrors/apple2.caltech.edu/.

Trenco Apple II Archive - http://www.gno.org/a2archive/
Devin Reade's Apple II archive site is undergoing a major renovation and reorganization. Until the files on the old Trenco site are completely migrated to the new site, they are available via ftp at ftp://ftp.gno.org/pub/apple2-old. This site is also the home to GNO, a Unix-like operating system for the IIgs.

The UM Apple II Archives - http://www.umich.edu/~archive/apple2/
The University of Michigan Apple II archive site. This site is "in hibernation" and hasn't been maintained recently, but contains many files related to the Apple II for download. There is an FTP mirror of the UM Archives at: ftp://ftp.uu.net/systems/apple2/ An HTTP mirror is at http://www.apple2.org.za/mirrors/apple2.archive.umich.edu/

What Is The IIgs (Alex Lee) - http://www.whatisthe2gs.apple2.org.za/
Three Apple IIgs software sites in one: The Apple IIgs Anachronistic Application Ring, The IIgs Gaming Memory Fairway, and The Apple IIgs Educational Retrospective Slam Dunk. Here you can find Apple IIgs applications, games, and educational programs in Shrink-It format for real Apples and .2mg disk image formats for emulators. Also has documentation and box scans for most of the programs.

The XGS Archive - http://www.inwards.com/xgs/archives.html
An archive of 'abandoned' IIgs software in .2mg disk image format for the XGS and other emulators. Has brief descriptions of the files.