EdSurge has categorized about 1500 products so far, using 5 main categories (Curriculum Products,Teacher Needs,School Operations,Post Secondary, and "Everything Else") and dozens of subcategories to provide an easy to use interface to learn about "ed tech" tools and services. The structure behind EdTech Index makes it easy for educators to learn about products in a just a couple of clicks.
Dweeber is an internet tool that allows young students to have study sessions with their friends, and discuss their homework. It allows students to solve problems, talk about issues and share ideas on projects.
Flowboard is a free app that allows users to create presentations on the iPad. You can add images, text and video to the presentation to make them look more appealing and informative. This app lets students make group presentations on topics assigned to them. When working in groups, students have to cooperate with each other to make a presentation that explains a particular topic to the rest of the class.
What about collaboration on the iPad? Well, a number of the tools in this listing will work fine on many platforms, but Titanpad is geared specifically towards the iPad. TitanPad lets people work on one document simultaneously, and you can get a space for your team on your own private subdomain for free.
Clyp.it is the second easiest-to-use audio recording tool that I've used. The easiest to use is still Vocaroo. To record on Clyp.it you simply go to the website and click the big record button (you may have to allow pop-ups in your browser in order for Clyp.it to access your microphone). When you're done recording click the share button and you'll be taken to a page on which you can download your recording or grab an embed code to post the recording on a blog.
"Vocabulary.com is comprised of three sections - The Challenge, Dictionary, and Vocabulary Lists. After creating an account, students can immediately begin playing the Challenge's interactive game to build knowledge and create a learning environment on their level. The Dictionary offers basic and advanced searches going beyond just definitions. Explanations and usage examples taken from current publications and classic literature provide a fuller context that helps fortify students' understanding. Thousands of word lists are available in the Vocabulary Lists section which also lets teachers and students create their own word lists based on assignments and personal interests."