The Global Jewish Database (The Bar Ilan Responsa Project) is the leading software for searching torah databases, developed by Bar Ilan University
The Bar Ilan Software's database contains keyed-in digital texts Containing more than 400,000 hypertext links This is more than 400 "SHUT" books, and more than 400 other judaic books . .
The Bar Ilan Responsa Project is the largest database of its kind. The database has the full text of the Bible with its principal commentaries, the Babylonian Talmud that includes Rashi's commentary and Tosafot, the Jerusalem Talmud, the Mishneh Torah of Maimonides,Shulchan Aruch with commentaries, hundreds of books of responsa, and the Talmudic Encyclopedia, that represent a period of over three thousand years of Jewish literary creativity. All these and more are included on a DOK (disk on key) at new Bar Ilan Sofware version
Hebrew site: שו"ת בר אילן