ceres-solver / ceres-solver

A large scale non-linear optimization library

lmfit / lmfit-py

Non-Linear Least Squares Minimization, with flexible Parameter settings, based on scipy.optimize, and with many additional classes and methods for curve fitting.

apache / commons-math

Apache Commons Math

optimatika / ojAlgo

Pure Java LP, QP and MIP solvers plus fast linear algebra. Zero dependencies, MIT licensed. Mathematical optimization and linear algebra for the JVM.