A C# wrapper for the levmar library, a GPL native ANSI C implementations of the Levenberg-Marquardt nonlinear least squares algorithm originally implemented by Manolis Lourakis and available at http://users.ics.forth.gr/~lourakis/levmar/.
The C# wrapper was implemented by Adalberto L. Simeone (http://www.adalsimeone.me) and is released under the terms of the GPLv3 license.