I've had years of happiness with the following program.
http://www.ebicom.net/~dhyams/cvxpt.htm
Donald Chun Kit Wong wrote:
> We need a curve fitting program for the standard curve for a number of
> ELISA we're running. I would appreciate any suggestions as to a good
> program to use for Win98. Thanks!
>> Donald Wong
> Dept. of Pathology
> The University of British Columbia