The Bartleby Library at Columbia University houses a fine collection of Electronic Texts . MIT maintains a full selection of Classical Texts in older translations.
Latin texts obtainable through ftp.
The George Mason University Homepage is building a substantial Latin Library in HTML format. Latin texts and fragments are also available at Urich Harsch's beautifully presented Bibliotheca Augustana . The Online Books Page and The Great Books Homepage also provide many links worth following up. The best source for classics bibliography is now the Gnomon bibliographische Datenbank. TOCS-IN is still worth a try.