The resources out there are staggering, these are just a few of them. Browse away.
Alan Wallace
High octane, trenchant, no holds barred, Alan is ridiculously intelligent and blazingly clear. As a scholar and practitioner he's devoted his life to making Tibetan Buddhism accessible to modern people without diluting the tradition. He's got a lot to say about shamatha (mental stability) and the connection between science and buddhism. Be warned if your not ready to have your flipped upside down then move along. The full content from over eight different two month retreats is available at the links below. I'd highly recommend listening sequentially for at least the first few mp3s just to get your bearings.
http://media.sbinstitute.com/courses/fall2011/
Bhikkhu Bodhi
He's responsible for a number of the most widely distributed and important translations of Pali (the original language of Buddhism) texts. Below is a link to his commentaries on the entire Majjhima Nikaya (the middle length discourses).
http://bodhimonastery.org/a-systematic-study-of-the-majjhima-nikaya.htm
Buddhist Geeks
A couple of Naropa (the only Buddhist college in America) students got together and decided to start a blog for modern buddhism. It's got a wide range of interviews on the podcasts, from the superficial to the profound.
https://itunes.apple.com/us/podcast/buddhist-geeks/id211752923?mt=2
Dalai Lama
Need I say more?
So you probably know about his tireless peace work and the his roll disseminating Tibetan Buddhism. You also probably know of his reputation for simplicity, clarity, and compassion. You might or might not also know that he's one of the most formidable scholars on the planet. The broad range of his talks are available below ranging from his address to congress upon receiving the congressional metal of honor to hardball buddhist philosophy that nit picks the finer points of epistemology.
http://www.dalailama.com/webcasts
Dharma Talks.net
It's a classic dharma audio website. Built out of devotion and freely shared, it contains deep stores of excellent content. And good luck funding any of it unless you know exactly what you want! It points to some of the resources that I'd love to find a way to distribute more effectively and to the immense work that's already gone into sharing these resources.
dhammatalks.net/audio_files.htm
Dharma Seed:
Dharma seed is the audio home for much of the Modern Vipassana world. They’ve been working with audio dharma since the days when it was literally taped and they are still at it. It's an incredible contribution to the world. Their library features many monastics as well as lay practitioners.
Suzuki Roshi
He was a zen monk and teacher who helped popularize Zen in America and was instrumental in founding both the San Francisco Zen center and Tassajara.
suzukiroshi.sfzc.org/dharma-talks/
shunryusuzuki.com/suzuki/sf.htm
DYI Dharma
"This site is the online home of the D.I.Y. Dharma sangha – a peer-led community of freaks, geeks, queers, trans*folk, rebels, outcasts, stream-enterers and our friends." - from DYI Dharma
This site has an excellent compilation of may different buddhist teachers. It has a lot of content and is easier to navigate then many sites. Definitely an inspiration.
On Being
Krista Tippet is renowned as the foremost journalist on matters of spirituality and religion. She's had conversations with many of the most important figures of out time, working to shed light on the ideas and lies of the wise among us. Her work has been broadcast on public radio and a now vast collection is available at On Being.
Reggie Ray: Dharma Ocean
Reggie Ray was a close student of Chogyam Trungpa. His scholarship under Mircea Eliade at the University of Chicago, over ten years of solitary retreat, and 40,000 hours of formal mediation practice all give his voice a certain gravitas. Over the years he has pioneered an approach that is rooted in the body and offers a vital perespective for students at all levels.
Learn to Meditate: http://www.dharmaocean.org/meditation/learn-to-meditate/
Podcast: http://www.dharmaocean.org/meditation/podcasts/
San Francisco Zen Center
One of the oldest and most influential centers in American Buddhism. Their site contains a lot of material including some very old mp3s.
http://www.sfzc.org/teachings/audio/recorded-dharma-talks
Thai Forest
Of all the reform movements in Thailand in the 20th century, the most lasting has been the Thai Forest tradition. The pioneers shunned the scholastic approach to Buddhism and sought through awakening through dedication to the practice of meditation and immersion in the natural world. Tough, stripped down, and no nonsense, this tradition remains one of the most vital in all of modern buddhism.
Teachings: https://forestsangha.org/teachings/audio
Ajahn Jayasaro: https://forestsangha.org/teachings/audio/speakers/ajahn-jayasaro
Ajahn Sucitto: https://forestsangha.org/teachings/audio/speakers/ajahn-sucitto
Thanissaro Bikkhu
Thanissaro Bikkhu has spent over 22 years as a monastic in the Thai Forest Tradition. He founded the first Thai Forest Monastery in the United States and brings the intense rigor of his training in Asia to the listener in a large library of talks.
Thich Nhat Hanh
Thich Naht Hanh is one of the heros of the last century. As a young monk he was a promising scholar and a lover of the monastic forms. He came of age during the Vietnam war and spent thirty years devoting himself to relief work. In order to keep his practice alive he had to pay close attention to his day to day activities and thus engaged buddhism was born. When the war ended instead of being extolled for his relentless service he was promptly expelled by the new communist government. The man knows suffering and he knows how to hold it with tremendous grace.
He remains one of the most important buddhist alive today.
This is one of those sites that has a HUGE amount of content. On the left is a feed of his talks as he delivers them, if you scroll down on the right you will find the talks sorted by category and date.
Upaya
The Upaya Zen center in Santa Fe is overseen by the brilliant, and indefatigable Roshi Joan Halifax. Her openness to diversity and insistence on the highest standards makes this collection unique. It’s “big roof buddhism” at its best and there is a rich selection of material that can be mined.
https://www.upaya.org/dharmatalks/speaker/
To get started maybe try retreats that were led by these teachers.
Zencast
Since 2005 Zen Cast has been sharing one dharma talk weekly. The has a nice clean layout and a simple organizing principle. It is both a good place to poke around and also an example of what I mean by "curation." To inspire and then link a number of curators of this type is one of the dreams of DiveITO.
We are always looking to make this list fuller and more coherent. Please send feedback if you have suggestions on this front.