In the screenshots, the example application plotting a parabola and the plot of the sinc(x) function.
Why OresmeKit? In honour of Nicolas Oresme the antique philosopher who thought about coordinates long before Cartesius. Because Cartesius was too predictable as a name and too tied to X-Y plotting, while OresmeKit shall support more chart types in the future. What's next? I plan on adding some more features to the Cartesian drawing view first. Then typical charting views: bars, lines, pies... At some point some optimization and computation will be available, since otherwise plotting of large datasets will be unbearably slow.
OresmeKit and its examples are available in GAP and are yet unreleased, check the CVS repository.