urgent HELP !! (out off topic,)

[Max Lawson <mlawson drfmc ceng cea fr>]

	Hi there!

I would like to modify some curves : actually to make baseline corrections.
The data are in ascii format and are of the type y = f(x).

Is there any free software available to perform such task ? Maybe Gimp ?

Thanx in advance, Max

P.S. Even M$-softs are welcome