Freeware Descriptions:
IGP.net is a simple graph plotting application with emphasis on interactive edition.
Here is complete features (taken from authors site):
IGP.net supports point-based data, polynomials, functions defined by arbitrary expressions, integrals, Lagrange interpolation, B-Splines, linear regression and much more. Requires: Microsoft .NET Framework 2.0.

File Size / OS:
- 161 KB / Windows 9x - ME - 2000 - NT - XP - 2003 - Vista
Download IGP.net v0.9.1: