WabbitCode is a z80 IDE (Integrated Development Environment) for OS X. It's written using the Cocoa framework in Objective-C, and requires 10.5.5 to run. It features a tabbed text editor, syntax highlighting, code completion, built in assembling, source level debugging, and much more. The user interface is modeled after Xcode, but tuned specifically for z80 calculator development.

Note: To anyone awaiting updates, development on this project is still active and I will post a major update when time allows.