macHasher
Ok, it’s simple, but at least it’s an application that’s not just a “Hello World!” knockoff.
This is a mac implementation of the xkcd website’s geohashing spontaneous adventure generator. It runs on OSX 10.4 and above. It MAY run on pre-Tiger versions of OSX, but I provide no support, and don’t guarantee that it’ll run on those.
Screenshot:

Future Features:
- Arbitrary Dow Jones Opening (you supply the opening bell figure) - feature included in the nearly-completed v1.1
- Google mapping integration
- Display all hashes given a date/Dow Jones range
- Alerts when hash falls within a radius of a given location
