Perseus Collection of Greek and Roman Materials
The Perseus Library contains primary and secondary texts for the study of ancient Greece and Rome; in addition to this, you'll find a massive library of art objects, sites, and buildings. The library's catalogs document 1305 coins, 1909 vases, 2003 sculptures, 179 sites, 140 gems, and 424 buildings. Each catalog entry has a description of the object and its context; most have images. Descriptions and images have been produced in collaboration with many museums, institutions, and scholars. Catalog information and keywords have been taken from standard sources, which are cited in the entries for each object.
The Theoi Project
A The Theoi Project is a site exploring Greek mythology and the godsin classical literature and art. The aim of the project is to provide a comprehensive, free reference guide to the gods (theoi), spirits (daimones), fabulous creatures (theres) and heroes of ancient Greek mythology and religion.
https://www.hs-augsburg.de/~harsch/augustana.html (Biblioteca Augustana)
http://penelope.uchicago.edu/Thayer/E/Roman/home.html (Lacus Curtius)
Everything you wanted to know about LSJ plus English-Ancient Greek searching ability
LOGEION: Simultaneous look-up of a word in several resources