I will admit to having played, used, and binned hundreds of apps by now and the three which have me coming back again and again are:


Stanza - free eBook reader


Oxford Deluxe - English Dictionary and thesaurus


Mantis Bible Study

Lately, the updates to the Quick Office have made it a great app for: Spreadsheets, Text and word processing documents, and finally, users can enter Chinese/Japanese with little to no trouble. Thank you Quick Office!


Quick Office - iDevice Microsoft Office app