CONV. - Convert YouTube video to MP3, GIF or MP4
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
Downie - Video download for OS X. Downie supports at this moment over 1,000 different sites.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Yout - YouTube to Mp3 Converter
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.