Package: wnpp I've been maintaining xgraph, but it seems to have been superseded by the superior ygraph, which provides similar functionality based on gtk and without any problematic upstream branches with DFSG-unclear patches.
It'd be great if someone else would package ygraph http://www.aei.mpg.de/~pollney/ygraph/ It would be fine to coordinate adding a suggests: ygraph to xgraph, and gently encourage people to transfer over to ygraph.