According to its self-presentation, “The Thesaurus Linguae Graecae® (TLG®) is a research program at the University of California, Irvine. Founded in 1972 the TLG has collected and digitized most literary texts written in Greek from Homer to the fall of Byzantium in AD 1453. Its goal is to create a comprehensive digital library of Greek literature from antiquity to the present era.”
Every scholar working with ancient Greek texts know TLG; it is a wonderful source also for Philo scholars. Some years ago the texts were available on a CD; now the site given above makes the texts available online, some for free, others need a subscription. Several Lexica are also available.
Last update: March 29, 2023: “The TLG has been updated with 70 new works from 51 authors. Additions include works by Byzantine authors, such as Theodorus Prodromus, Joannes TZETZES , Nicephorus Chrysoberges, Theodorus PEDIASIMUS, GREGORIUS II Patriarcha and others. Post-Byzantine additions include works by Georgius AETOLUS, Leonardus PHORTIUS, PROCOPIUS NAZIANZENUS, Antonius BUBULES, Basilius VATATZES, and Jacobus TRIBOLES.”