MoSync is an open source SDK, with many tightly integrated components, for creating cross-platform mobile applications.

It includes compilers, runtimes, libraries, a device profile database, an emulator and more.

The kit is has an Eclipse-based IDE for C/C++ application development and comes with a detailed documentation.

Some of the built-in libraries are: graphics, audio, multimedia and TCP/HTTP/Bluetooth/SMS which enables you to interact with almost every features of mobile platforms including:

• Android Cupcake 1.5
• Java ME MIDP 2 (J2ME)
• Moblin 2.x
• Pocket PC 2003
• Smartphone 2003
• Symbian S60 2nd, 3rd, and 5th ed
• Windows Mobile 5.0-6.5

and others like iPhone, Blackberry, MeeGo are to be included.

To sum up, the kit is great for anyone who wants to develop for multiple mobile platforms with the same tools and logic.

JuiceKit is an open source software development kit (SDK), which integrates with Adobe Flex, for building "information experience" applications.

The SDK includes components for controls, visualizations & utility classes that are easy to implement & aesthetically pleasing.

To better define the SDK, some of the components it has are a treemap, US Map, "copying data to the computer's clipboard" & much more..

These components can be used independently, within other applications or assembled together to create full applications.

JuiceKit is very well-documented & there are few examples provided to show the things that can be created.