Websites for free encyclopedia, no sign up need and no subscription need

Here are several websites where you can access free encyclopedia content without needing to sign up or subscribe:

**Wikipedia** (wikipedia.org) - The most well-known free encyclopedia, covering a vast range of topics in multiple languages. It's user-edited and provides extensive information on many subjects.

**Encyclopedia.com** - A free resource that compiles information from various encyclopedias, offering articles on a wide variety of topics.

**Citizendium** (citizendium.org) - A community-driven encyclopedia that aims to provide a high-quality, expert-reviewed knowledge base.

**Stanford Encyclopedia of Philosophy** (plato.stanford.edu) - A free, authoritative resource for philosophy topics. It contains entries written by experts in the field.

**Internet Encyclopedia of Philosophy** (iep.utm.edu) - Another great resource for philosophy, offering articles on various philosophical topics and theories.

**Britannica Online (Free Version)** (britannica.com) - Though it offers subscription options, there are free resources and articles accessible without a subscription.

**World Digital Library** (wdl.org) - A project of UNESCO and the Library of Congress, it provides access to cultural documents and sources along with relevant historical information.

**OpenStax** (openstax.org) - Primarily an educational resource, it offers free textbooks and materials across a range of subjects, suitable for learning and reference.

**Wikipedia's sister projects** - Other projects like Wikiquote, Wiktionary, and Wikimedia Commons offer additional resources for quotes, definitions, and media related to subjects.

These are good starting points for finding factual information without any payment or required registration.