Another original language resource website: Παρακάλυψις. It’s got OT, NT, Apocrypha/Pseudepigrapha, Patristics and classics. Some stuff comes up online, and other stuff you have to use djvu (like pdf) software.
HT: Παρακάλυψις – Primary Source Website I just downloaded Dio Cassius' Roman History from the Loeb collection. This is a very useful resource. Check it out.