Full-featured app for reading, annotating, organizing, and sending PDFs. Offers ability to annotate PDFs with pen, highlighter, audio recordings, and photos. For iPad or Android tablet.

Evri develops iPad, iPhone and Android applications that provide news, photos, videos and tweets. You may customize your app to get updates on your favorite topics.

Evri ceased to exist in 2012.

http://www.geekwire.com/2012/paul-allen-backed-evri-calls-it-quits/

NoteBook is an application that offers a notebook-like interface for organizing digital information. Technical features include the ability to take notes and edit, add sticky notes, copy/paste information, diagram and sketch, annotate, import/export files, and more.

Bibliogo is a journal article web app that allows you to create and share bibliographies, manage journal alerts, follow feeds, tag citations, and order articles. You can connect your LinkedIn account, and others, with this web-based app.

Roambi Flow is an iOS online publishing service. Roambi allows you to transform Excel data and other publications to visualizations compatible with mobile, and also send them to the iPhone or iPad.

Nature.com reader apps allow you to read scientific content on the iPhone, iPad, iPod Touch, or Android. You may browse news and free open access content, save material to read for later, save searches, and access the articles' references. With a subscription you will have full access to their content.

GoodReader is a PDF reader for iPad, iPhone and iPod Touch. GoodReader allows you to read anything -- books, movies, maps and images -- on your mobile device.

Dragon Dictation is a voice recognition application that allows you to speak and instantly see your text content from email messages to blog posts on your iPad, iPhone, or iPod Touch.

MLA, APA, Chicago / Turabian and most-common Bluebook forms as an integrated citing and note-taking platform for individual or group projects. Prompts for analysis of source types and is unique in offering teaching support and personal help on any citation. Instructor / librarian view allows teacher to comment on work-in-progress providing just-in-time feedback in-context. Archives copies of web pages and pdfs which can be annotated. Dashboard provides long-term access to a portfolio of work.

NoodleTools MLA Lite is a free version with a Bibliography component and limited set of citation types appropriate for elementary or middle-school students.

Popplet is an online mind mapping and collaborative brainstorming tool.