The Responsa project

de Rashi, Moses Maimonides, Universiṭat Bar-Ilan. Proyeḳṭ ha-shut

Contains Tanach, Aggadic Midrashim, Babylonian Talmud, Rashi's commentary, Maimonides' code, and includes 253 books of rabbinical responsa covering a period from the 8th century to the present.