🚀 go-pugleaf

I'm looking for some software on the Mac to do Chemistry revision.
We already have something on our Vax, but its pretty loosely connected
having been written by a number of people over a number of years. (and 
to be honest, a lot of it is pretty condescending).

It does things like titration calculations and moles to grams conversions 
etc.  Its intended as revision of school stuff for first year
chemistry students at university.  It also has some more advanced stuff
for later years.

What we'd ideally like is a package that has already got some revision there, 
but that we can expand upon (easily).  I've had a look at the intellimation
catalogue, anybody have any comments on their chemistry tutor?

Free or cheap is nice, but we are prepared to pay for something good.

Oh, yeah, metrics please, we don't want to have to fiddle around with 
inches and pounds.


Thanks in advance, Susan.