Shiurim from Rav Gifter Zatzal
http://www.closetotorah.com/shiurim/

Rav Hartman’s shiurim on Maharal
http://ggbh.info/Shiurim/archive/rss1.php?rssFile=RabbiHartman.xml

Interviews of talmidim reminiscing about Rav Aharon Kotler
http://www.shemayisrael.com/ravaharon/bio.htm

Thousands of shiurim from Kol Halashon
http://www.kolhashiurim.com/New/HomePage/NewDefaultMsg.aspx?English=True

More shiurim including Rav Reisman
http://www.mp3shiur.com/

Rav Shimon Schwab’s shiurim on Sefer Melachim
http://www.englishtorahtapes.com/melachim.htm

Shiurim from Monsey Night Seder Beis Midrash
http://www.nightseder.com/downloads/

Free Shiurim from Ohr Someach
http://audio.ohr.edu/free

Rabbi Shafier
http://www.theshmuz.com/index.html

Halacha shiurim for Rav Shmuel Fuerst
http://psak.org/

Rav Zev Leff

http://www.rabbileff.net/

Rav Nissan Kaplan
http://ravkaplan.dafyomireview.com/

Rav Yitzchak Berkovitz
http://www.thejerusalemkollel.com/online_classes.php

Thousands of shiurim
http://www.torahanytime.com/

Rabbi Rudinsky
http://www.rabbirudinsky.org/Shiurim/

Shiurim from Sefardic Rabbanim
https://www.learntorah.com/lt-search-result.aspx