For more work-oriented mobile databases, an app worth considering is DDH Software's $10 HanDBase for iPad.

Two other noteworthy apps give you remote access to full-fledged database management systems from the iPad. The $40 FileMaker Go for iPad [37] lets you query and edit FileMaker Pro databases, while the $2 SQLTouch lets you run queries and manage records in MySQL databases.

Mind-mapping and whiteboarding

If you do mind-mapping -- a method of organizing thoughts and items by their relationships -- CMS's $10 iThoughts HD could be the tool for you. It works with several mind-map formats and lets you export your mind maps to PNG and PDF. It also syncs to Box.net and Dropbox cloud storage services.

Markus Müller's $6 MindNode is another mind-mapping tool to consider. Among its capabilities is support for VGA output to a monitor, provided you have a VGA adapter for your iPad.