A detailed list of iPad/iPhone apps for a wide variety of construction uses.
Houston Neal of Software Advice has assembled an annotated list of iPhone/iPad apps for construction management.
The article, explaining his methodology, is at:
http://www.softwareadvice.com/articles/construction/the-best-construction-management-apps-for-the-iphone-and-ipad-1082510/
There is a detailed list of apps, without the article, stored as a spreadsheet for public viewing and download at Google Apps:
https://spreadsheets.google.com/ccc?key=0AiO1FFCnXI6IdHZCOFROTlgzcXRxV0U2eDZLVFdMT0E&hl=en&authkey=COajw-MK#gid=0