Corpus Scriptorum Latinorum: A collaborative project aiming to create a digital library of all Latin literature. Currently it is mainly a catalogue of available Latin texts on the internet.
The Internet Classics Archive: A searchable archive of Greek and Roman texts in English translation. The list of texts may be searched by author, title, date or translator and the works themselves are searchable by word or phrase.
The Latin Library: A collection of Classical and Neo-Latin texts from ad Fontes Academy.