In order to support 64-bit iOS and OSX, Xamarin has to make some breaking changes to the way it implements the mapping between C# and Objective-C libraries. Rather than being mapped to 32-bit types, NSInteger and CGFloat are now mapped to the new platform-specific data types nint and nfloat.
Brian Sam-Bodden, founder of Integrallis, gave a demonstration at the Barcelona Ruby Conference on how to leverage RubyMotion and open source 2D graphical libraries to quickly create 2D games for iOS in plain Ruby without any knowledge of Object-C.
Harlan programming language developed by Eric Holk, a doctoral student at Indiana University provides support for rich data structures, trees and ragged arrays in addition to higher order procedures.
Objective Sharpie is the child of Aaron Bockover. This tool creates C# bindings suitable for use in Mono for Objective C SDKs. Objective Sharpie works by using Clang to parse Objective C header files. Since the process is automated, and has full access to the header, binding errors should be non-existent for most libraries.
Xamarin has made yet another major step in completing their vision on providing a set of common tools for cross-platform mobile development. With the announcement of Xamarin 2.0 comes a rebranding of their products, a new IDE called Xamarin Studio, a Visual Studio add-in for iOS development, and a component store, the later being detailed by Miguel de Icaza for InfoQ.
GitHub has open sourced Boxen used internally for automated configuration of Mac laptops, a tool that could be converted to set up Linux or Windows machines.
Xamarin, makers of the popular MonoTouch and Mono for Android platforms, have entered into the Mac App Store market with Xamarin.Mac.
OpenSim represents a freely available open source software system for modeling and simulation of movement. The system is provided by NCSSR (National Center for Simulation in Rehabilitation Research) which denotes a research department within Stanford University, California. The spectrum of possible application domains such as rehabilitation medicine, robotics, or games makes OpenSim interesting.
Version 2.6 of MonoDevelop, the open-source IDE for .NET and Mono development, includes several new features, the most notable of which are Git integration and support for the Mac platform via the MonoMac add-in.
GPU.NET 2.0 supports Mono, enabling building and deploying computational intensive applications for Linux and Mac OS X along the already supported Windows.
GitHub have launched a desktop client for Mac OS X called simply GitHub for Mac.
The MacRuby team's busy working towards MacRuby 1.0, recently with the 0.10 release which adds XCode 4 support. Meanwhile, the first applications written using MacRuby have shown up in the Mac AppStore. Also: MacRuby seems to be part of the upcoming "Lion", Mac OS X 10.7.
The Chameleon project has been launched by the Iconfactory to allow UIKit-based applications to be ported to MacOSX. This enabled Twitterific for OSX to share 90% of the code with its iOS version and ultimately permit Iconfactory to do simultaneous releases on the iOS and Mac App Stores.
MonoMac, the newest attempt at creating a GUI toolkit for C# on OS X, has hit its 1.0 release. MonoMac is designed to be much more consistent with other .NET/Mono libraries. This is done by offering a thicker wrapper around the Cocoa APIs that obeys the .NET Framework Design Guidelines.
Apple has released iOS 4.3, the latest version of its operating system for mobile devices. This is available for iPhone (4 and 3GS), iPod Touch (3rd and 4th generation) as well as iPad and iPad 2 devices, as well as Xcode 4 which includes the LLVM 2.0 and LLDB 1.0 toolchains.