Logos
Reading app for the Bible. Many translations are available. It includes Greek and Hebrew references.

iPhone, iPod touch and iPad (requires iOS 4.0 or later): Free.
Android: Free.

Lectionary
Review this week’s texts on your iPhone. 

iPhone and iPod touch (iOS 3.0 or later): $0.99.
iPad (requires iOS 3.2 or later): $4.99

Facebook
Updating your church or organization’s Facebook page frequently is critical! Photograph the potluck or vacation Bible school gathering and post it directly to Facebook. It couldn’t be easier.

iPhone, iPod touch and iPad (iOS 4.0 or later): Free.
Android: Free.
Blackberry: Free.

Dropbox
Dropbox is an easy- to-use app that adds a nice little folder icon to your desktop. It automatically syncs any file that you put in that folder to other computers with Dropbox installed. Dropbox makes it easy to access those files from virtually anywhere.

iPhone, iPod touch and iPad (requires iOS 3.1 or later): Free. 
Android: Free.
Blackberry: Free.