Gnuplot for DebianScience. See also EduGnuplot.
Pros
Cons
not very good for 3-D. For example gnuplot cannot plot stream lines, velocity vectors etc.
Not much 3D support - Stream lines cannot be drawn, vector plots cannot be drawn.
you can not use your own customized colors and non ASCII inscriptions.
gnuplot's barely-DFSG license has caused problems for Debian in the past. See #100612
Licensing issues
Is there a specific reason for the package being built without GNU readline support.
In the README.Debian. See also #322827.
Tips
How to manually add support for readline.
There is also rlwrap
And ledit