Xamarin now provides a single API for both Mac OS and iOS for 32-bit and/or 64-bit.
Google has open sourced Chrome PDF engine, which allows to view and print PDF files, and fill PDF forms. The announcement came earlier this month from Foxit Software, the original maker of Foxit PDF SDK, which Google chose as the base for its Chrome PDF engine. Formerly closed-source, Chrome PDF code is now hosted on Google Source as the PDFium open source project.
Performance is one of the benefits that Apple claims its new Swift programming language should bring to OS X and iOS developers, and being in beta hasn't prevented independent developers from running benchmarks and reporting their findings. Perhaps unsurprisingly these show that in some cases Swift performance is not yet satisfactory.
Apple introduction of Swift, a new programming language for the OS X and iOS platform, has sparked some interest from the developers' community. If you are interested in learning more about Swift, here you can find some useful online resources.
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.