SimFiT

{{Infobox software

| name = Simfit

| logo =

| developer = William G. Bardsley, University of Manchester

| latest_release_version = 8.1.4

| latest_release_date = July, 2024

| operating_system = Windows

| genre = numerical analysis

| license = GNU AGPL

| website = [https://simfit.uk]

}}

Simfit is a free open-source Windows package for simulation, curve fitting, statistics, and [https://simfit.uk/simfit.html plotting], using a library of models or user-defined mathematical [https://simfit.uk/user_defined_models.html equations]. Simfit has been developed by Bill Bardsley of the University of Manchester. Although it is written for Windows, it can easily be installed and used on Linux machines via WINE.{{Cite web|title=WineHQ - Simfit|url=https://appdb.winehq.org/objectManager.php?sClass=application&iId=5181|access-date=2021-10-04|website=appdb.winehq.org}}

Simfit is developed using [http://www.silverfrost.com Silverfrost Limited's] FTN95 Fortran Compiler and is currently featured on their website as a [http://www.silverfrost.com/37/ftn95/ftn95_showcase.aspx showcased application]. The graphical functionality in Simfit has been released as a Fortran library called [https://simfit.uk/simdem.html Simdem] which allows the programmer to produce charts and graphs with just a few lines of Fortran. A version of Simdem is shipped with the Windows version of the NAG Fortran Builder.

A Spanish-language version of Simfit is maintained by a team in Salamanca.

At Version 8.1.1 a simplified version of simfit called sv_simfit designed for first-time users is bundled with the main simfit package.