durand-kerner
Finds multiple roots of polynomials using Weierstrass' method
poly-roots
Find all roots of a polynomial using the Jenkins-Traub method
flo-poly
A practical, root-focused JavaScript polynomial utility library.
quadratic-roots
Compute the real roots of a quadratic equation in a numerically stable manner
scslre
A library to find JS RegExp with super-linear worst-case time complexity for attack strings that repeat a single character.