Alert3V5 Version 5.1 is a program to alert
  you by screen and sound when a satellite(s)
  10 to a 1000, are passing within the users
  specified Area. needs Tracksat & Qbasic.

  Arbitrary precision RPN line
  oriented calculator with
  virtual stack and memory
  registers, and financial and
  date functions. Usage is free.
  Source code available from author
  for $10 under GNU copying
  restrictions. This is a DOS
  program, can run in a window
  under Windows. Help function

  Arizona Deep Sky database for use with
  SkyMap  version 4.7.  Contains 5925
  objects to mag 15 (The def. deepsky cat
  w/skymap has only 1276

  ±²Û DEGREE 2 RADIANS 1.0 Û²± - gives you
  a radian measure of an angle you input as
  well as the reference angle >> FREE*BUT*
  WARE ® FAST! Worth d/ling whether you're
  a math genius or a casual file browser.
  Once again it's FREE*

  Distribution Functions and Probabilty
  Calculator, Mark Von Tress; $10.
  calculates several statistical
  distribution functions and some simple
  power calculations for statistical
  hypothesis tests. The distributions are
  the normal, t, chi-square, F and beta
  distributions.

  ±²Û GRAPHIT 3.2 Great graphing program Û²±
  FREE*BUT*WARE ® Graphs six trigonometric
  functions including but not limited to
  COSINE, SINE, TANGENT, SECANT, COSECANT,
  COTANGENT.  Accepts input for period and
  amplitude and shift.  Now accepts MOUSE, &
  PI values as well as sound.  You can also
  specify Y axis range.  FAST!  FUN!  Worth 
  the d/l whether you're a math genius or just
  a casual file browser. Once again it's FREE*

  Merlin 1.5f (T.M. Parker; $31) is a
  comprehensive hurricane/tropical storm
  tracking tool for the 1993 hurricane
  season. It builds advisory reports from
  user input, great circle calculations,
  linear and curvi-linear regression
  modeling, and neural network decisions.

  Mr. Machinist is an easy-to-use menu driven
  math program designed to solve the every day
  geometry and trigonometry problems that
  machinist and industrial engineers encounter.
  Get the chord of a circular sector, convert
  decimal degrees to hours, minutes and
  seconds find the proper speed and feed for a
  machining center, view a decimal chart, use
  the scientific calculator for formulas, and
  also edit multiple files. F1 help 2 the max!

  MVSP 2.1 - A MultiVariate Statistical Package
  provides an inexpensive yet easy means of 
  analysing your data.  It performs principal 
  components, principal coordinates, and 
  correspondence analyses, as well as cluster 
  analysis, using eighteen different distance 
  or similarity measures and seven clustering 
  strategies, and diversity indices.  Graphs 
  may be plotted on most printers and data 
  imported from Lotus 1-2-3 files.

  ORBITEL Version 9333 by Dave Ransom
  Sorts and selects 2-line orbital elements
  from Celestial BBS, OIG RBBS, and CSS BBS
  for use with satellite tracking programs
  such as STSORBIT PLUS. Shareware, optional
  registration is only $10.00!

  SKYMAP Ver 4.7 , Is a Satellite Tracking and
  Star Charting Program. Many new features are
  added with ver 4.7.

  STSORBIT PLUS Version 9334: Track and display
  any satellite for which orbital data is avail
  able. Used by NASA and the aerospace industry
  as well as hams and "just plain folks" around
  the world. Math coprocessor chip recommended.
  Now includes Multi-Satellite Tracking Feature.
  By: Dave Ransom, 7130 Avenia Altisima, Rancho
  Palos Verdes, CA  90274  USA.

  South Scanner Satellite Services Chart volume
  2 number 5 dated June 5, 1993.  Published
  by Robert Smathers (Albuquerque, NM USA) it
  is a listing of the North American satellites
  and the audio/video services on them that
  a home dish owner can get.  New to this 
  issue: improved satellite headers, ATIS
  signals, updated service movements.

  NASA/NORAD 2 Line Satellite Elemets Sets for
  Satellite Tracking Programs. Over 600 Sats
  are listed.