The first thing anyone who is looking to download software from ftp sites on the net should do is to read the FAQ. The best reference I've seen online on how best to do this sort of thing was originally compiled by Nathan Mates. It has been reorganized and can be found at http://www.gno.org/pub/apple2/doc/FAQs/.
Once you've studied up and have a good idea of how to properly download and unpack files from the net, then try these sites:
DAR Systems International - Adventure game software for the Apple II and IIgs, from Eric Seiden and his associates. Titles include:Mines Of Moria and Mines Of Moria II (The Sequel), The Pits Of Doom!, Realm of Altair Series, Gem Of Zephyrr, Sword of Altair, Quest For Varsar Trilogy, Sable Powers Rising, Casino Games, and the famous ProLine BBS package. All are legal downloads from DAR Systems and their copyright holders. http://www.darsys.net/dsi.html
Apple II Software from Apple - Apple maintains an archive of 8-bit and 16-bit software for the II and IIgs. The selection ranges from the last release of GS/OS (System 6.0.1), HyperCard IIgs v1.1, Apple II system utilities, and ShrinkIt v1.1. You'll need to run Mac OS on some machine to unpack these archives.
AV Systems Software - Richard Hall, the current owner of AV Systems Software has placed all of the company's Apple II titles into freeware status. These programs which contain distillations of public domain software are mostly DOS 3.3 based, but should run under ProDOS. They can be downloaded from his ftp site: ftp://184.108.40.206. Use the login name AVSystems and note that it is case sensitive. Since no password is required, just hit "return" at that prompt.
Free Software for the Apple II - Gareth Jones (http://www.intergate.ca/personal/gslj/index.html has taken on the monumental task of codifying much of the DOS 3.3, ProDOS (8-bit) and IIgs-specific (16-bit) Apple II software that has been reclassified and released for free downloading. You can access this site at this url:
Marinetti - Marinetti users should check out Kelvin Sherlock's new program, Marlene, a color VT100 telnet utility for the Apple IIGS. Users should note that besides Marinetti, this programs requires a GNO/ME or ORCA compatible shell. Kelvin has also released a utility to help the user more easily connect and disconnect Marinetti to their system. More information can be found at http://www.syndicomm.com/~kws/iigs/
Trenco Apple II Archive - In late 1997, a group of Apple II users and programmers decided to open another ftp archive site, plus mirrors. The master ftp site is hosted under the gno.org domain. It is accessible either by ftp or by http:
For FTP access, you should log in as "anonymous" at ftp.gno.org. This site does allow uploads to the directory ftp://ftp.gno.org/incoming.
Delphi - The Best of A2 - this site displays a selection of some of the best and latest files available from the A2 Forum on Delphi. It is also restricted to Delphi subscribers only. Be aware that these files are standard .bxy archives, and have been tweaked to allow for downloading via the web interface so no decoding is necessary. They will also download just fine as true binaries using Lynx v2.7+! http://www.delphi.com/apple2/besta2.html
Software from Lazarus Long http://www.lazilong.com/apple_II/ Long time Apple II stalwart Laz Long has made many of his creations Freeware or inexpensive shareware. A2snipper3.0 and an installer for Bird's Better Bye are available for the Apple II, and a variety of Apple II utilities for the Macintosh - a2pix, ImageConverter, Apple ][ Font, and the powerful Apple DOS File System for mounting any Apple II disk image type, are also available.
Neil Parker's Collection of Apple II WWW and FTP Sites This is a terrific site of working hyperlinks and information to finding Apple II software online. Well maintained and frequently updated.
Ninjaforce - Jesse Blue is back! Animé, Asimov (a disk image utility), Deskplay, Megademo, Picture Ripper II, Revenge Of The Bobs, and more is now available for download from the Ninjaforce web site.
Ground - the Apple II/IIgs Software Archive at the University of Iowa
Message from Brett Davis:
This Apple// archive exists because people all across the internet raised the funds to buy the 1.7gig disk this archive uses. I donated the machine to host disks for archives of software for machines that are no longer produced or actively supported. I am willing and able to support disks for Amiga, Atari, CP/M, etc...
Nova Scotia Apple U.G. Archive Lots of files and information areas for both the Apple II and Apple IIGS.
Babylon - the Caltech Apple II Archive An ftp archive running on Dan Zimmerman's personal workstation, containing utilities, resources, games, and much more.
University of Kentucky Math Sciences Archives Games, graphics, demos, and other miscellaneous Apple II utilities.