Clot
CLOT is a library for plotting data sets in charts of different types. Currently it supports bar, histogram, line, and pie charts, all with some optional graphic decorations. It requires SCLF and CL-GD.

Homepage: http://wcp.sdf-eu.org/software/clot/index.html

Download: http://wcp.sdf-eu.org/software/clot/clot-20110308.src.tbz

License: (L)GPL according to Walter C. Pelissero's Software bits