Well, it (slightly) predates D3, for what it's worth: https://github.com/dhotson/springy/commits/master?page=4 https://github.com/dhotson/springy/commits/maste

Well, it (slightly) predates D3, for what it's worth: https://github.com/dhotson/springy/commits/master?page=4 https://github.com/dhotson/springy/commits/master?page=4 https://github.com/mbostock/d3/commits/master?page=91 https://github.com/mbostock/d3/commits/master?page=91 If all you need is spring layout without the rest of D3, Springy might be a better fit.