- Coprinus: Studies in Coprinus - Keys to Subsections & Species in Coprinus
- Echinosteliales (Myxomycetes): an INTKEY Package for Interactive, Illustrated Identification & Information Retrieval
- Ed's E-Key, a User-friendly Point & Click Key to the Mushrooms of North America
- Fungi of California: a Simplified Key
- Home of the Xylariaceae
- Hypomyces Interactive Key
- Key and Literature Guide to the Genera of Lichenized Fungi (Lichens) in the Neotropics
- Key for Smut Fungi Known in Costa Rica Based on the Families of Host Plants
- Key to Clitopilus in Costa Rica
- Key to Collybia Sensu Stricto of the Northeast United States & Canada
- Key to Fungi in Glomales
- Key to Gomphillus of Eastern North America
- Key to Gymnopus of the Northeast United States & Canada
- Key to Inocybe
- Key to Laccaria in Costa Rica
- Key to Lime-loving Lichens of Eastern North America
- Key to Lophodermium
- Key to Mycenas of Norway
- Key to North American Armillaria Species
- Key to Paxillus
- Key to Phaeocollybia in Costa Rica
- Key to Pholiota
- Key to Rhodocollybia of the Northeast United States & Canada
- Key to Rhodocollybia of the Northeast United States & Canada
- Key to Rhodocybe in South America & Costa Rica
- Key to Rhytismataceae Genera
- Key to the Genus Ophioparma in Eastern North America
- Key to the Genus Parmelia Sensu Stricto in Eastern North America
- Key to the Lichen Genera of the Guianas
- Keys to Cortinarius Subgenus Dermocybe in Nordic Countries
- Keys to Genera & Species of Caliciales in Norway
- Lichen Determination Keys Available on the Internet
- Lichen Determination Keys: Hyperphyscia
- Lichen Determination Keys: Megalosporaceae
- Lichen Determination Keys: Neotropical Hypotrachyna
- Lichen Determination Keys: Neotropical Parmotrema
- Lichen Determination Keys: Neotropical Stereocaulon
- Lichen Determination Keys: Relicina
- Lichens of British Columbia, Illustrated Keys: Part 1, Foliose and Squamulose Species
- Lichens of the Ozarks: Key to Bacidia, Bacidina, Fellhanera and Some Other Species with a Similar Type of Spores
- Lichens of the Ozarks: Key to Protoblastenia
- Macrofungi of Costa Rica, Interactive Keys: Leccinum & Phylloporus in Costa Rica
- Podetiate Lichens of Highland Ecuador
- Ravenelia in the United States & Argentina
- Rhytismataceae by Host
- Synoptic Key to Hypoxylon Taxa
- The Genus Tilletia in the United States
- Tomentella related species
- Trial Key to Helvellaceae of the Pacific Northwest
- Trichoderma (Fungi, Ascomycetes, Hypocreales)
- TuberKey, an Interactive Key for Identification of Truffles
- University of West Virginia, Diagnostic Keys to Major Tree Fruit Diseases in the Mid-Atlantic Region
