This thread exists to aggregate learning resources about Ecto.

Feel free to add links to blog posts, articles, screencasts, etc. to the Wiki (this post) as well as in a new post in the thread (so everyone else is alerted as well)

Release Updates

Ecto 2.0.0-rc is out!

Guides

Ecto for Beginners - Learn the basics of Ecto through a series of guides by Jonathan Birkholz
Ecto Basics - by Ryan Bigg
From Zero to Ecto in 10 Minutes by @geo
Ecto 2.0: The Database Tool for Elixir and Phoenix (screencast)
Using Ecto For Formula 1 Standings by @geo
Ecto’s insert_all and schemaless queries by @josevalim, creator of Elixir and member of Ecto and Phoenix teams.
Using mix to Easily Create an Ecto Repo by @geo
Connecting to Multiple Databases with Ecto by @geo
Many to many and upserts by @josevalim, creator of Elixir and member of Ecto and Phoenix teams.

Informative

Ecto - the past, the present, the future by @michalmuskala
Diving into Ecto - an in depth look at Ecto by Lew Parker (multi part series)
How Ecto differs from Ruby’s ActiveRecord - amberbit.com
Ecto for Rails developers - renderedtext.com
Combining an Ecto Model with an Arc Uploader in Elixir by @Joseph_Kain
What’s new in Ecto 2.0 - free ebook by @josevalim, creator of Elixir and member of Ecto and Phoenix teams.
RailsConf 2016 - ActiveRecord vs. Ecto: A Tale of Two ORMs by Brad Urani
Ecto, what about it? by @amandasposito
Leveling Up With Ecto - ElixirConf 2016 by @darinwilson

Useful topics

Ecto and Postgres schemas