This is a old mirror of the SIMTEL20 site, but perhaps more recent.
   DIR 00_start
   DIR 4dos
   DIR ada
   DIR ai
   DIR animate
   DIR apl
   DIR arcers
   DIR arcutils
   DIR asm_mag
   DIR asmutl
   DIR astronmy
   DIR autocad
   DIR basic
   DIR batchutl
   DIR bbs
   DIR bbsdoors
   DIR bbslists
   DIR bible
   DIR binaryed
   DIR biology
   DIR bootutil
   DIR borland
   DIR business
   DIR c
   DIR cad
   DIR calculte
   DIR catalog
   DIR cdrom
   DIR chemstry
   DIR clipper
   DIR clocks
   DIR commprog
   DIR compress
   DIR cpluspls
   DIR crossasm
   DIR database
   DIR dayo
   DIR decode
   DIR deskaces
   DIR deskpub
   DIR desqview
   DIR dirutl
   DIR disasm
   DIR diskutil
   DIR dv_x
   DIR editor
   DIR educate
   DIR eel
   DIR electrcl
   DIR emulate
   DIR engin
   DIR envutil
   DIR execomp
   DIR fileutil
   DIR finance
   DIR flowchrt
   DIR foods
   DIR forms
   DIR forth
   DIR fortran
   DIR fossil
   DIR freemacs
   DIR genealgy
   DIR geogrphy
   DIR geology
   DIR gif
   DIR graph
   DIR graphics
   DIR hamradio
   DIR handicap
   DIR health
   DIR html
   DIR hypertxt
   DIR imail
   DIR info
   DIR install
   DIR internet
   DIR io_utils
   DIR irit
   DIR keyboard
   DIR lan
   DIR langtutr
   DIR laser
   DIR legal
   DIR lingstcs
   DIR literatr
   DIR mailnews
   DIR mapping
   DIR math
   DIR mcintosh
   DIR memutil
   DIR menu
   DIR microsft
   DIR misclang
   DIR mmedia
   DIR mormon
   DIR mouse
   DIR music
   DIR muslum
   DIR naplps
   DIR ncsatlnt
   DIR nettamer
   DIR network
   DIR neurlnet
   DIR nfs
   DIR notabene
   DIR novell
   DIR packet
   DIR pascal
   DIR pcboard
   DIR pctech
   DIR perl
   DIR pgmtips
   DIR pgmutl
   DIR pktdrvr
   DIR plot
   DIR postscrp
   DIR printer
   DIR progjorn
   DIR projmgmt
   DIR qbasic
   DIR qmodem
   DIR qtrdeck
   DIR ramdisk
   DIR rbbs
   DIR recreatn
   DIR satelite
   DIR schedule
   DIR science
   DIR screen
   DIR security
   DIR semware
   DIR simulatn
   DIR sound
   DIR sports
   DIR spredsht
   DIR statstcs
   DIR surfmodl
   DIR swap
   DIR sysinfo
   DIR sysutl
   DIR tcpip
   DIR teaching
   DIR telegard
   DIR telix
   DIR tex
   DIR tiff
   DIR torah
   DIR travel
   DIR tsrutil
   DIR turbo_c
   DIR turbobas
   DIR turbopas
   DIR turbovis
   DIR txtutl
   DIR ubasic
   DIR uemacs
   DIR uucp
   DIR vga
   DIR virus
   DIR visbasic
   DIR viscii
   DIR waffle
   DIR weather
   DIR wordperf
   DIR worldmap
   DIR wwiv
   DIR x_10
   DIR xwindows
   DIR zmodem