Top 10 Programming languages used in Popular websites

10. Twitter.com Front-end:JavaScript, Back-end:C++, Java, Scala, Ruby on Rails
Twitter is an online social networking and microblogging service that enables users to send and read short 140-character text messages, called "tweets". Registered users can read and post tweets, but unregistered users can only read them.

Image Source: http://twitjump.co.uk/how-does-twitter-work/
9. Bing Front-end:JavaScript, Back-end:ASP.NET
Bing is a search engine that brings together the best of search and people in your social networks to help you spend less time searching and more time doing.

8. Blogger Front-end:JavaScript, Back-end:Python
Free weblog publishing tool from Google, for sharing text, photos and video.

Image Source: http://kingvector.wordpress.com/category/vector/logos/
7. Wikipedia.org Front-end:JavaScript, Back-end:PHP
Wikipedia, the free encyclopedia

Image Source: http://blacksheepspringfield.com/2013/09/28/black-sheep-has-a-wikipedia-page/
6. MSN.com Front-end:JavaScript, Back-end:ASP.NET
Log on for News, Cricket, Bollywood, Videos, IE9 and access Outlook.com formerly Hotmail, Skype on MSN

Image Source: http://wwwjinghenglim.blogspot.co.uk/
5. Outlook.com Front-end:JavaScript, Back-end:ASP.NET
Outlook.com is a free, personal email service from Microsoft. Keep your inbox clutter-free with powerful organizational tools

Image Soruce: http://www.zdnet.de/88172134/microsoft-aktualisiert-weitere-android-und-ios-apps/
4. Yahoo Front-end:JavaScript, Back-end:PHP
Yahoo! Inc. is an American multinational Internet corporation headquartered in Sunnyvale, California.

3. YouTube.com Flash, Front-end:JavaScript, Back-end:C/C++, Python, Java
YouTube is a video-sharing website, created by three former PayPal employees in February 2005 and owned by Google since late 2006, on which users can upload, view and share videos.

Image Source: http://www.phpost.net/topic/19819-logo-youtube-psd-rczero/
2. Facebook.com Front-end:JavaScript, Back-end:Hack, PHP, C++, Java, Python, FBML, Erlang, D, Xhp
Facebook is an online social networking service. Its name comes from a colloquialism for the directory given to students at some American universities.

Image Source: http://www.digitaltrends.com/social-media/facebook-will-get-aggressive-facebook-feed-spam/
1. Google.com Front-end:JavaScript, Back-end:C, C++, Go, Java, Python
Google is an American multinational corporation specializing in Internet-related services and products. These include online advertising technologies, search, cloud computing, and software. Most of its profits are derived from AdWords.

Image Source: http://algo2013.inria.fr/sponsors.shtml
JavaScript (JS) is a dynamic computer programming language. It is most commonly used as part of web browsers, whose implementations allow client-side scripts to interact with the user, control the browser, communicate asynchronously, and alter the document content that is displayed.[5] It is also being used in server-side programming, game development and the creation of desktop and mobile applications.