This is a specifically created Community Wiki which gathers resources for learning English and [it has been approved by the Community itself](http://meta.ell.stackexchange.com/q/316/94).

It should be clear that **the resources are not written by one user or only by the mods, but by whoever wants to contribute.**

Just write in the appropriate answer/section. If you have questions or concerns, [ask a Meta question](http://meta.ell.stackexchange.com/questions/ask) so we don't clutter the comments. You can link your Meta question from the comments.

Questions regarding such resources are still allowed, but they will be closed as a duplicate of this question if they are too broad. Specific and on topic requests are welcome ([ask on Meta](http://meta.ell.stackexchange.com/questions/ask) if you're unsure about your question). Follow the instructions made in the question about how to post, what can be posted, etc.

<hr>
###Organization

- Each answer contains only one type of resource, and all resources that type.
- If possible, state whether the material is directed towards a **beginner**, **intermediate** or **advanced** audience.
- **Do not** include links that lead to illegal content or sites that host such content. If you see any, please **flag for moderator attention**, select _other_, and specify the offending resource. It will be deleted as soon as a moderator sees the flag.
- Follow the [community rules on self-promotion](http://ell.stackexchange.com/faq#promotion).
- Please indicate whether each resource is free or paid and if registration is required.
- Do not post images. They would take too much space.
- Use descriptive links instead of bare URLs where possible.
- Add resources in alphabetical order so that they will be easier to find. Resources starting with non-Latin characters should go after the end of the alphabet.

_Note: New rules could be added in the future. Please [ask a Meta question](http://meta.ell.stackexchange.com/questions/ask) if you think a rule should be added, removed, or changed._
 
<hr>
###Index

- [Audio books](http://ell.stackexchange.com/a/4712/94)
- [Books](http://ell.stackexchange.com/a/4711/94)
- [Browser add-ons](http://ell.stackexchange.com/a/4713/94)
- [Corpora](http://ell.stackexchange.com/a/4733/94)
- [Dictionaries](http://ell.stackexchange.com/a/4714/94)
- [Newspapers](http://ell.stackexchange.com/a/4715/94)
- [Online courses](http://ell.stackexchange.com/a/4716/94)
- [Podcasts](http://ell.stackexchange.com/a/4717/94)
- [Software](http://ell.stackexchange.com/a/4719/94)
- [Television](http://ell.stackexchange.com/a/4720/94)
- [Textbooks](http://ell.stackexchange.com/a/4721/94)
- [Thesauri](http://ell.stackexchange.com/a/4731/94)
- [Translation services](http://ell.stackexchange.com/a/4734/94)
- [Websites](http://ell.stackexchange.com/a/4722/94)