The SiP dataset
The data is described in the paper: "A conversation around the analysis of the SiP effort estimation dataset" by Derek M. Jones and Stephen Cullum
https://arxiv.org/pdf/1901.01621.pdf
If you make use of this data in a paper, please let us know.
Fullstack D3 and Data Visualization by Amelia Wattenberger, uses the SiP dataset in example plots.