π Reading
Books
Beginner-friendly: Gerda Malaperis (alternative version with sound) and Karlo.
Public domain e-books: Project Gutenberg is a digital library offering free e-books in many formats, with a good number of interesting works in Esperanto.
Audiobooks: LibriVox is a library of public domain audiobooks, narrated by volunteers. It has many works in Esperanto.
Free e-books: esperanto.us has free e-books and audiobooks in Esperanto from a couple of authors like Jack Vance, distributed with permission.
Creative Commons works: Vikifontaro has books under the CC BY-SA 4.0 license.
Magazines and blogs
Easy articles for beginners: uea.facila publishes short articles in easy-to-understand Esperanto, targeted at learners. Articles contain mostly simpler words, with a few more complex ones accompanied by their definitions.
The world through local perspectives: Monato is an Esperanto original monthly magazine with political, economical and cultural stories from around the world, similar to Times or Newsweek, but the authors are locals who know the situation closely, rather than foreign correspondents.
Underrepresented viewpoints: Global Voices is a multicultural community of volunteer writers and translators, collaborating to disseminate stories featuring voices and experiences often overlooked by mainstream media. Articles are translated into many languages, including Esperanto.
News on the Esperanto community: Libera Folio is an online periodical covering developments in the Esperanto-speaking community. It is independent from the UEA and regional associations, and provides a critical perspective.
Science blog: Scivolemo is a great blog on varied scientific topics such as astronomy, biology and psychology.
Numismatics magazine: The Esperanto-Numismatika Asocio publishes a free quarterly magazine.
Wikis
Encyclopedia: Vikipedio is the Esperanto edition of Wikipedia, with 350k+ articles, comparable in size to the Danish edition. A good learning activity is to compare Esperanto articles with their English counterparts, or to read articles on subjects you know well about.
Travel guide: VikivojaΔo is the Esperanto counterpart of Wikivoyage. It has 1200+ pages with tips for visiting many countries, regions and cities around the world.
Satire: Neciklopedio is the Esperanto encyclopedia that documents the truths Vikipedio doesn't want you to know.
Others
Open-source comic book (translated): Pipro kaj KaroΔjo
Jokes: Ridejo is a website where people can share jokes in Esperanto.
Food: Bonan Apetiton is a repository of recipes from all over the world.