Bit Map

Bit Map

(iOS)
Bit Map is an offline map viewer for your own topographic or specialised maps in common image file formats (eg, png, jpeg) or even ozf2 and ozfx3 (non-RC4 only) image files. It works even when there is no phone or WiFi network available.
Snail Mail

Snail Mail

(Mac OS X)
Snail Mail is an envelope addressing and printing application which interacts directly with the Address Book database in Mac OS X. Note that Snail Mail was open sourced in January 2011 (after having been temporarily discontinued in June 2009). Snail Mail is now available from the Snail Mail project on Git Hub (note that this is maintained by another developer and not supported or maintained by NIXANZ).
Yum

Yum

(Mac OS X)
Yum, the worlds greatest recipe management application, has been acquired by 'Dare to Be Creative'. The new home page for Yum is: http://creativebe.com/yum/
Headway

Headway

(iOS)
Headway will point to your chosen target location, no matter how you hold your iPhone, and the arrow will even swing to indicate the accuracy of the compass reading. It's like a compass that points to any location you choose, instead of just pointing north.
Bit Map Imager

Bit Map Imager

(Mac OS X)
Bit Map Imager is a very simple application for viewing OZF2 and OZFX3 (non-RC4 encrypted) image files on Mac OS X, and for converting these and other image types to PNG, JPEG, or Bit Map (for iOS).