I know only some of the forms of Devi Lakshmi..
Mahalakshmi
Ashtalakshmi / Mahalaxmi
1 ..Dhan Lakshmi
2 . Dhanya Lakshmi
3 . Dhairya Lakshmi
4 . Veer Lakshmi
5 .. Aadi Lakshmi
6 . Vidya Lakshmi
7 . Santan lakshmi
8 .Gaj Lakshmi
These are collectively called “Ashtalakshmi”.
Santan Lakshmi
Aadi Lakshmi
Veer Lakshmi
Devi Sita worshipping Devi Gauri
Other forms are:-
Vijay Lakshmi,
Shridevi
Bhu devi
Kamla devi
Vedvati
Padmavati
Satyabhama and Jambhanti is also considered as Forms of Lakshmi
Sita
Rukmini
Tulsi
Shaligram is also considered as Form of Devi Lakshmi.
Belpatra ( it is said that Belpatra is also a form of Lakshmi) .