Ruby on Rails is an open-source web framework that’s optimized for programmer happiness and sustainable productivity. It lets you write beautiful code by favoring convention over configuration.
We use Ruby on Rails for all our in-house web application development. AdzSquare is our first web application developed using Ruby on Rails.
Mac OS X desktop application development using Objective-C 2.0 and Cocoa.
Cocoa is Apple's name for the collection of frameworks, APIs, and accompanying runtimes that make up the development layer of Mac OS X.
By developing with the Cocoa frameworks you will be writing applications the same way that Mac OS X itself is written, with complete access to the full power of the operating system, including the signature Mac look and feel. Cocoa is simply the best way to create native Mac applications.
iPhone application development - Both native (iPhone SDK) and web applications.
iPhone is a small handheld device with a unique touch-screen user interface. It combines three devices— a phone, an iPod, and an Internet device—into one.
You can create Web 2.0 applications for iPhone that look and behave like native iPhone applications. Web applications seamlessly integrate with iPhone applications and services, including those for making a phone call, sending an email, and displaying a location in Google Maps. Web applications can extend the capabilities of iPhone without compromising its reliability or security.