Classics

Title
Thesaurus linguae Latinae (TLL)

A massive dictionary of Latin.  As of December 2019, the project includes A-M, O-P. It is expected to be completed by 2050.

This is not a Latin-English translation dictionary, but more akin to what the Oxford English Dictionary is for English.

It is being provided open access (free) in large PDF chunks on this website.

A New York Times article describes it thus:

Project MUSE
Includes the full text of over 320 scholarly journals in the Arts & Humanities and Social Sciences fields.
Medieval and Classical Literature Library
Collection of the most important literary works of Classical & Medieval civilization. Search or browse by title, author, genre & language.
Oxford Academic - Oxford University Press Journals and Ebooks

Oxford journals (about 240) and ebooks purchased from Oxford. This does NOT include the Oxford English Dictionary which is on its own platform.

JSTOR Comprehensive Collection

Provides access to archival issues of over 4,500 scholarly journals across most academic disciplines. Includes primary source materials.

The collections are the following: Arts & Sciences I to XV, Business IV, Hebrew Journals, Ireland, Life Sciences, Lives of Literature, Public Health, Security Studies, Sustainability, Global Plants, Struggles for Freedom in Southern Africa, World Heritage Sites: Africa, and 19th Century British Pamphlets.

Academic Search Complete
A multi-disciplinary database which provides full text for more than 8,500 periodicals, including full text for over 7,300 peer-reviewed journals.
Classics