Twitter is a free app that lets you connect with people, express yourself, and discover more about the things you love. Hear about breaking news first. See what your favorite celebs, athletes and public figures are chatting about. Catch a glimpse behind-the-scenes at the Oscars, concerts, sporting events, and more ...

Remember the Star Trek computer? It's finally happening--with Wolfram|Alpha. Building on 25 years of development led by Stephen Wolfram, Wolfram|Alpha has rapidly become the world's definitive source for instant expert knowledge and computation. Across thousands of domains--with more continually added--Wolfram|Alpha uses its vast collection of ...

Official Wikipedia App for Windows 8.1. Wikipedia is the free encyclopedia containing more than 20 million articles in 280 languages, and is the most comprehensive and widely used reference work humans have ever compiled. Send us your feedback on Twitter @WikimediaMobile. The code is 100% open source and community ...

Dropbox lets you take your photos, docs, and videos anywhere and share them easily. Access any file you save to your Dropbox from all of your computers, phones, tablets, and on the web. With Dropbox you’ll always have your important memories and work with you. And if something happens ...

TED's official app presents talks from some of the world's most fascinating people: education radicals, tech geniuses, medical mavericks, business gurus, and music legends. Find more than 1700 TEDTalk videos and audios (with more added each week) on the official TED app -- now for Windows.