Olive Tree Bible Software has put together a very nice ESV Study Bible app.
Here are some screenshots from an iPhone:
This Bible includes the BibleReader with the following features:
- Three tap Verse Chooser to quickly go to any verse
- Word search to quickly find any word or phrase in the document
- Palm, Pocket PC, Smartphone, and Symbian also support: phrase search, display options, split screen for viewing multiple resources, scrolling options, and more
Supported Mobile Platforms for ESV Study Bible:
- iPhone, iPod Touch
- Palm OS (including LifeDrive, Treo 650, Treo 680, Treo 700p, Tungsten E2, and TX)
- Windows Mobile Pocket PC (including Dell Axim, HP iPAQ, Palm Treo 700wx and Treo 750)
- BlackBerry (including 8703e, Curve and BlackBerry Pearl)