Fortran Wiki
Unit testing frameworks

FUnit

Fortran Unit Test Framework (FRUIT)

FortUnit

Ftnunit

Fytest - lightweight unit testing framework for Fortran. Thanks to its header-only design, it can be easily bundled with any Fortran project without creating extra dependencies.

pFUnit

toast - Testing Or ASsertion Toolkit - Fortran unit testing library

Vegetables

UnitTest

Zofu

FortUTF - Unit Test framework written purely in Fortran to be compatible with as many projects as possible

XFunit - Native Fortran 2003 Unit Testing Framework