Nuptial Arithmetic: Marsilio Ficino's Commentary on the Fatal Number in Book VIII of Plato's Republic: Searchable online text of this book by Michael J.B. Allen, which includes his translation and extensive commentary on this work.
On Obtaining Life from the Heavens: Excerpt from the third of Ficino's Three Books on Life. Translated by Carol V. Kaske and John R. Clark.
On the Alchemical Art: An English translation of this text on the relation between philosophy and alchemy, which is ascribed to Ficino.