Some Wikipedia Alternatives

Wikipedia is a massive source of resources for students and others. Wikipedia has blacked out its English-language site for 24 hours. Wikipedia gone offline for 24hrs to protest against SOPA (Stop Online Piracy Act) and PIPA (Protect IP Act) in US Senate. So how will its regular readers get information? Here's some alternatives for Wikipedia.

1. Google Scholar

Google Scholar provides a search of scholarly literature across many disciplines and sources, including theses, books, abstracts and articles.

2. Wolfram|Alpha

Wolfram|Alpha is a "computational knowledge engine" that uses specific algorithms based on specific assumptions to answer questions, rather than just give search results. The results also come back with sources and references that the site used for your computation. Wolfram|Alpha is more than a search engine. It gives you access to the world's facts and data and calculates answers across a range of topics, including science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music

3. HARO 

Reporters in need of a source can use this forum to have their queries answered. Help a Reporter Out (HARO) claims to "deliver the sources that match your exact needs directly to your inbox."

4. Encyclopedia Britannica

Encyclopedia Britannica is written and continuously updated by approximately 100 editors and more than 4,000 contributors. It's regarded as one of the most scholarly encyclopedias and it is available online.

5. Quora

Quora connects you to everything you want to know about. Quora aims to be the easiest place to write new content and share content from the web.

6. Project Gutenberg

Project Gutenberg has 36000 free ebooks for Kindle, Android, iPad, iPhone. 

7. IMDb

The Internet Movie Database (IMDb) provides information about entertainment world - movies, television shows, celebrities and more. 

8. eHow

eHow is an online how-to guide with instructional articles and videos, created by freelancers. Any eHow user can leave comments or responses, but only contracted writers can contribute changes to articles.