PolyRoots
PolyRoots finds the roots of a polynomial to any chosen accuracy using Laguerre's Method. The coefficients of the polynomial can be real or complex. PolyRoots uses my own multi-precision engine, fp. PolyRoots is released as freeware, with no restrictive licenses.
PolyRoots is a Universal Cocoa application.
Freeware.
Version 2.0 allows polynomial entry in the form: x^2-4x+3
Version 3.1 corrects bugs where 9.999...999e-1 was incorrectly rounded to 1.e-1 rather than 1.e0, and where, rarely, certain inputs caused the application to hang.
Version 3.2 corrects a rare division bug.