A Divine Voice telling Yonatan ben Uziel that he should not translate the "Writings" section of the Torah: Megillah 3a
Divine Voice announcing that the Nochri who saved Rabban Gamliel in exchange for a section of the World to Come would in fact make it in: Taanit 29a
A Voice Saying that the World is fed in the merit of Rabbi Chanina Ben Dosa, who in turn is forced to make do with only a Kav-Measure of Carobs weekly: Berachot 17b
In the debate between Beit Hillel and Beit Shammai: Pesachim 114a
The students of Shammai debated with the students of Hillel for three years, until a Divine Voice announced that although the words of both are the words of the Living Gd, the law follows the students of Hillel, due to their gentle humility: Eruvin 13b
Rabbi Pereida had a student who needed to have a lesson repeated 400 times in order for him to learn it properly. Once, the student still didn't understand, and the student explained it was because he had heard someone telling Rabbi Pereida he would have to get Rabbi Pereida for a Mitzvah later, so that the student had his mind on Rabbi Pereida having to leave. Rabbi Pereida then sat and taught him the lesson 400 more times. A Divine Voice emerged and offered Rabbi Pereida 400 years of extra life, or merit for the next world for his generation. Rabbi Pereida took the latter, and so Gd gave him both: Eruvin 54b
A Divine Voice supporting the legal ruling of Rabbi Eliezer: Bava Metzia 59b