10 apps that rocked iPad users' world in 2010When the iPad celebrates its first birthday next month, it should raise a glass to Apple's App Store, which has provided users with an array of \n\ninnovative applications. Late last week, Apple released a list of the 10 most popular iPad applications, with productivity apps making up the bulk. Here \n\nthey are:\n\nSlideshow: 12 iPhone (and iPad) Accessories That Define You\nSlideshow: 7 Crazy iPad Accessories\n\nPages\nDeveloper: Apple\nPrice: $9.99\n\nApple re-jiggered its word processing program for the iPad to optimize it for a large touchscreen. The program lets you create documents from a \n\nnumber of templates and send them to anyone using Pages '09, MS Word or PDF formats\n\n\nGoodReader\nDeveloper: Good.iWare Ltd.\nPrice: $2.99\n\nReading and editing PDF files is typically neither colorful nor fun. But GoodReader is aiming to change that (well, the colorful part at least) with this \n\nreader that lets you edit PDFs using bright colors and graphics. Among other things, you can create yellow "sticky notes" on the PDF for annotations, draw \n\ncircles or rectangles around key passages and highlight entire paragraphs with bright colors.\n\n\nNumbers\nDeveloper: Apple\nPrice: $9.99\n\nNumbers is Apple's basic spreadsheet application reformatted for iPad. Like other spreadsheet programs, Numbers lets you sort data and present it in \n\nseveral kinds of graph formats. The program's files are also compatible with MS Excel.\n\n\nAngry Birds HD\nDeveloper: Chillingo Ltd.\nPrice: $4.99\n\nHere's a popular game that lets you control an angry red bird that's trying to get its eggs back from a thieving gang of green pigs. And yes, while this \n\nsounds like a metaphor for communism, it's also an addictive and popular game that lets you launch birds from a giant slingshot and fire them \n\nkamikaze-style into the pigs' bases. Wait, why do birds need a slingshot to fly? Oh well, the game is fun regardless.\n\n\nKeynote\nDeveloper: Apple\nPrice: $9.99\n\nKeynote rounds out Apple's major trio of in-house productivity apps as the company's answer to PowerPoint. This is the type of app that seems best \n\nsuited for the iPad since it involves a lot of drag-and-drop formatting and it has relatively little typing compared with the word processing and spreadsheet \n\nprograms.\n\n\nGlee Karaoke\nDeveloper: Smule\nPrice: $0.99\n\nBased on the hit musical-comedy series, this karaoke app lets you sing along to your favorite tunes on the show. The program anticipates that you \n\nwon't be very talented, which is why it includes features such as pitch correction and additional harmonies. And if you're feeling really confident, you can \n\neven record your karaoke performance and post a video of it on Facebook or Twitter.\n\nWolframAlpha\nDeveloper: Wolfram Alpha LLC\nPrice: $1.99\n\nThe goal of WolframAlpha is to provide you with an insane amount of up-to-date information on just about everything. What encompasses everything? \n\nWell for starters, let's go with trigonometry, current weather conditions, historical weather conditions, up-to-date economic statistics, real-time astronomy \n\ncharts, Olympic trivia& OK, you get the point. WolframAlpha wants to help you become the annoying guy at parties who always fact checks people with \n\nhis tablet.\n\n\nPinball HD\nDeveloper: OOO Gramprom\nPrice: $0.99\n\nAn arcade classic that's been redone for large touchscreens, Pinball HD seems like a perfect game for the iPad: It's large, colorful and doesn't involve \n\nany intricate controls. The game includes several pinball templates to choose from so you won't be playing on the same board over and over again.\n\n\nFriendly Plus for Facebook\nDeveloper: Oecoway\nPrice: $0.99\n\nFriendly Plus is a platform that optimizes Facebook for the iPad and gives you access to full-screen photos, chat and more. \n\n\n \n\n \n\n\n\n\n\n \n\nStarwalk\nDeveloper: Vito Technology\nPrice: $4.99\n\nAnd finally here's an educational astronomy app that can teach you about stars, planets and constellations with a gorgeous graphics display. The iPhone \n\nversion of the program was named one of Apple's "Best Apps of 2009" and it's a safe bet that the iPad's larger graphics display will make it look even \n\nbetter.