eIFL-FOSS ILS is a project supporting evaluation of and migration to free and open source (FOSS) integrated library systems (ILS) in developing and transition countries. Working closely with a network of eIFL-FOSS country coordinators, the project will conduct a series of pilots in order to identify and draft needed support documentation to enable libraries to evaluate their readiness for and undertake a migration to either the Koha or Evergreen FOSS ILS. eIFL-FOSS ILS is an opportunity for librarians in eIFL member countries to engage directly with the Koha or Evergreen FOSS development communities and to contribute to that development.