ReactOS

CMake and MSVC efforts continue and a variety of linking bugs have been resolved due to differing strictness between GCC and MSVC. Service control manager events are now logged in the system log.
Service startup and shutdown has been cleaned up significantly. The pagefile has been limited to 2GB in size due to FAT limitations.

A rewrite of the kdcom kernelmode library, which is now much more compatible with the Microsoft version. This allows for improved built-in support for WinDbg. Support for delay loaded DLLs has been added to the build tools, providing delay loading functionality for shipped libraries. Support for Chinese and Korean fonts has been added. A selection of application compatibility improvements can now been seen, including Opera, Open Office, Firefox 3.5, VLC1.1, and Skype. Synchronization of most of the Wine usermode DLLs and some Win32 subsystem code shared with Wine.

Various NDIS and AFD problems have been solved, which increases compatibility with third party NIC drivers and hardening of the network stack. Preliminary support was added for sound via the new Kernel Streaming service. It's now possible to use the ac97 driver via the new Port Class library to play sound bytes using winamp. The command prompt is more compatible. Many bugfixes were made to the kernel mode portion of the GDI, resulting in a much improved drawing engine across all bit depths.

Various bugfixes and enhancements to kernel core services (e.g. registry, system information routines, sync primitives like guarded mutex, I/O support, and others). An initiative has been started to fix the remaining unstable parts of the kernel: Memory Manager, caching code, and filesystem driver APIs and other dependencies of Mm. Introduction of a new Portable Structured Exception Handling mechanism (PSEH 2.0). Various GDI drawing problems were fixed.

x64 architecture support was improved. A real MSVC compiler support project was started. Kernel improvements and bugfixes were made in quite a few parts: Configuration Manager, IO Manager, KE, Memory Manager, Object Manager, Process Manager. The network stack was improved with leakage fixes and increased functionality. Filesystem driver fixes were made, making them more compatible with the Microsoft NT cache manager. Win32 subsystem improvements and synching of most of the Wine usermode DLLs were done.