Podcasts
Podcasts are audio programs distributed online, usually via an RSS feed. Most people listen to them through "podcatcher" software, and there are several directories which catalogue active podcasts.
The first Terry Pratchett-related podcast was the no longer active The Pratchett Podcast in 2011. Since Terry's death, and particularly in the last few years, several shows have appeared where the hosts read and comment on the Discworld books. This is an adaptation of the popular "TV recap" podcast format. Such podcasts are sometimes described as "fancasts".
Active Podcasts
Listed in chronological order of release.
Radio Morpork
A Discworld podcast.
Official site: radiomorpork.wordpress.com
Launched August 2015; episodes (usually) released monthly.
Irish hosts Colm and Steve read each Discworld book in order, and create rankings.
Pratchat
A monthly Terry Pratchett book club podcast.
Official site: pratchatpodcast.com
Launched November 2017, released on the 7Ath of each month.
Australian hosts Elizabeth Flux (writer) and Ben McKenzie (comedian) read and discuss every Pratchett book (not just the Discworld), each with a special guest. Is not following strict chronological order. Also has a supporter only bonus podcast, Ook Club.
The Death of Podcasts
"A comprehensive review of Terry Pratchett's Discworld series."
Official site: aalgarcom
Launched November 2018; released monthly, usually on the 15th or 16th.
Hosted by married American couple Amanda Smith and Ron “AAlgar” Watt. Also on Tumblr.
Wyrd Sisters
Official site: wyrdsisters.podbean.com
Launched January 2019, released on the 28th of each month.
A monthly Discworld re-read podcast, hosted by Americans Dani, Manning and Liz.
The Discworld Portal
"A portal between that fantasy world called the Discworld and Roundworld, what we call reality"
Official site: mindkindle.net
Launched April 2019; released weekly.
A weekly Discworld discussion podcast. Hosted by "the Medieval Gnome", a Canadian(?) fantasy fan.
The Truth Shall Make Ye Fret
Official site: buzzsprout.com
Launched November 2019.
A weekly Discworld podcast. Hosts Joanna Hagan-Young and Francine Carrel read and recap every Discworld book in order, over three episodes for each book with a week off in between.
Desert Island Discworld
Official site: desertislanddiscworld.com
Launched November 2019; released weekly in seasons of six episodes.
A Discworld interview podcast. Host Al Kennedy interviews a variety of guests about their favourite Discworld books.
And he said to me
Official site: none, but it appears to be on most podcast platforms.
Launched December 2019, released sporadically (only two episodes as of April 2020).
Artist and author Bernard Pearson, longtime friend of Terry's and owner of the Discworld Emporium, shares stories about Pratchett in conversation with his other friends, including Rob Wilkins.
The Compleat Discography
A Discworld fancast.
Official site: compleatdiscography.page
Launched January 2020; released fortnightly, at least at launch.
“Four nerds” do a book club style read-through of the Discworld novels and related works, in publication order. Occasionally special guests; also intend to cover The Watch.
Who Watches the Watch
Official site: pinecast.co
Launched May 2020; released weekly, with 2-3 episodes per book discussed (so far).
An international collection of four Terry Pratchett fans - Charlotte, Lucy, Janos and George - re-read the Watch novels in anticipation of The Watch, planning to compare the two versions. They are also reading other Discworld books along the way.
Inactive Podcasts
The Pratchett Podcast
Launched October 2011; released monthly or bi-monthly for 61 episodes through to October 2018.
A sometimes monthly news, discussion and review podcast, mostly about the Discworld. Hosted by Graeme Sheridan and sometimes Rhys Parton. Most recent thirty episodes available here; the first fifteen episodes here.
Ankh-Morpork Public Radio
Official site: [1]
Launched in September 2016, and released monthly to November 2016.
A Discworld re-read podcast hosted by Discworld newcomer Trevor and long time Pratchett fan Jodhi Doyle. Only two episodes appear to have been made (The Colour of Magic and The Light Fantastic).