DISAFA
- FLORAE.it: dichotomous keys for the identification of plant species 1 (online transposition of Pignatti's 1982 text)
- Progetto Dryades: dichotomous keys for the identification of lichens in Northern Italy
- Dichotomous keys for the identification of vascular plants (by the University of Trieste)
- DBIOS Atlas of Botany