This is an exciting project by Andre Saine, a homeopath in Quebec
"Since 2005, André Saine with his colleagues from around the world have been at work to update the two most important tools used by homeopathic practitioners, namely the materia medica and the repertory...For each individual remedy, a monograph (word file) is compiled with a clear presentation of the entire characteristic symptomatology, based on provings, intoxication and clinical experience reports, and on a collection of all available cases...Only reliable and, for the main part, primary sources are considered. Modern sources are only used insofar as they are not speculative." Read more here. There are two free monographs available: Trillium pendulum and Quassia amara
You can see how incredibly thorough this project is; the monographs have an incredible volume of information and are well cited, unlike many Materia Medicas.