Dropbox - Store, synchronize and share files online with public access. Free version offers up to 16 GB. Provides a desktop client for Windows, Mac, and Linux, and has apps for iPhone, iPad, Android, and BlackBerry.
BooksOnBoard eBooks - Titles in ePub and PDF formats supported by iPads, iPhones, Android devices like Kindle Fire, PCs and Macs. Also offers DRM-free audio books.
EBookTakeAway - A library of fiction and non fiction books for free download for iPhone, iPad, Android, and Kindle in PDF and all popular eBook reader formats (AZW3, EPUB, MOBI).
Android Icons - Free and professional Android icon sets. Specially designed for Android application development. Each icon is available in 5 sizes and in 12 colors.