LibOSDK stands for Operating System Development Kit, Which is simply a library containing low-level architecture dependent assembly procedures, that you can use to develop your own OS kernel without using any assembly language code or even know about it. Currently LibOSDK only supports i386 architectures. However support for various architectures can be simply added. LibOSDK supports various compilers for different programming languages, it was tested with GNU gcc, NASM and FreePascal.
Project's web page: http://libosdk.berlios.de
WiEmu is an open-source distributed agent-based high fidelity software emulator/simulator
for heterogeneous wireless sensor networks.
With WiEmu, you can evaluate your network architecture, topology and/or protocols
as if they are running on real test-beds.
bwl(4) is an open-source driver for OpenBSD providing support for Broadcom 802.11 wireless BCM4313 chips.