Curve Fitting Software for Linux: Free Options Available?

[Rajini]

hello,
is there any curve fitting software for free for linux user??
I know only gnuplot..is there some more software..? something similar to igor or origin or sigmaplot...
Or these scientific fitting software are only available for windows??
please reply me about your free software, which you use for multiple peak fittings in linux..
thanks for your feedback..

 

[Dunhausen]

QtiPlot is similar to origin:
http://soft.proindependent.com/qtiplot.html

Grace:
http://plasma-gate.weizmann.ac.il/Grace/doc/Tutorial.html#s6

Scigraphica:
http://scigraphica.sourceforge.net/

Simfit:
http://www.simfit.man.ac.uk/

Python:
http://www.uncg.edu/phy/hellen/Python_Instructions.html#Curve_fitting

Octave:
http://www.gnu.org/software/octave/

Veusz:
http://home.gna.org/veusz/docs/manual.html#AEN14