An organized viewer for the well-known hadith book named "Ryad Al-Salehin - رياض الصالحين " it's also a search engine for the entire book. It includes the ability for you to send the Ahadith to friends by e-mail or sms.
The book is well organized, divided to books and chapters, supporting Arabic and English languages.
Ryad Al-Salehin for iPhone, iPod touch and iPad on the iTunes App Store