Macintosh educational software for the sciences

Many thanks to the respondents to my earlier posting concerning Mac
 educational software.  Here I present a summary of responses (if you need
 any more info than I have here, feel free to contact me, and I'll try and
 point you in the right direction):
 -----------------------
 Terry Yeung at Cal-Animage Berkeley forwarded a message he received about
 PD_Science, Professor Thomas O'Haver's catalog of science/math/engineering
 public domain and shareware programs available from CompuServe, America
 Online, GEnie, and a number of Internet addresses.  I looked through this,
 and it's a fairly hefty list.  It can be obtained by anonymous FTP
 from ra.nrl.navy.mil as MacSciTech/info/PD_Science.txt.  If you don't have
 Internet, you can grab it from GEnie or America OnLine, too.
 For further info, contact:
  Prof. T. C. O'Haver
  Department of Chemistry and Biochemistry
  University of Maryland
  College Park, MD 20742
  Internet: toh (+ at +) umd2.umd.edu
 -----------------------
 Al Lowrey mentioned a molecular structure visualization program called
 NANOVISION and pointed me toward the software office at ACS.
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 Laura Walsh at the University of Illinois suggested two software packages,
 SimEarth and SimAnt as potentially useful.
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 Dongchul Lim from Yale sent an extensive reply to Richard Swenson's query,
 which I believe we all received, that describes several modeling packages
 that are commercially available.
 -----------------------
 Mingzuo Shen pointed me toward several anonymous ftp sources for software.
 In addition to the ra.nrl.navy.mil MacSciTech group's collection mentioned
 by Iosif Vaisman to the bulletin board, he
 referred me to ftp.bio.indiana.edu, which has many scientific programs,
 and specific directories for biology, chemistry, and molecular biology
 programs (I'm still digging in this wealth of info), and to
 wuarchive.wustl.edu, at Washington University, which is REALLY loaded, and
 is going to take many fun hours of digging through.
 -----------------------
 Terry Stouch from Squibb and Jacquelyn Fetrow from SUNY-Albany mentioned
 Michael Levitt's program MacImadad as a useful molecular modeling
 program.  Jacquelyn Fetrow also suggested Autodesk for this purpose.
 -----------------------
 Greg Durst at Lilly gave addresses for two scientific software houses:
 BioSoft, PO Box 580, Milltown, NJ 08850 and Trinity Software, PO Box 960,
 Campton, NH 03223.  They have programs on enzyme kinetics and statistics,
 among others.
 -----------------------
 Ralph Merkle at Xerox suggested Chem 3D plus from Cambridge Scientific
 Computing (617-491-6862), which is a bit pricey, but is apparently
 a very good MM2 package.  He also suggested looking into the QCPE Mac
 software (812-855-4784).
 Cindy Fisher
 Department of Molecular Biology
 The Research Institute of Scripps Clinic
 La Jolla, CA  92037
 E-mail to: fisher (+ at +) scripps.edu