- ADIAC - Automatic Diatom Identification And Classification
- C.I.M.P. Subcommission on Acritarchs
- Calcispheres
- Cyanobacterial Image Gallery
- Diatom Collection
- Diatom Site
- Diatome home page
- Dinoflagellate Cysts from the Jurassic of Poland
- Dinoflagellates
- Fossil algae
- Home of Fossil Coralline Algae
- International Fossil Algae Association
- International Fossil Algae Association IFAA Phycologists Database
- International Society for Diatom Research
- PETRALGA (Permian and Triassic Algae) Project The Project was launched in order to build a solid database for the fossil Algae from the Permian and Triassic epochs. A main going-on sub-project deals with a catalogue for the Dasycladales.
- Silicoflagellates
- Silicoflagellates
- Stromatolite (Romanian)