OpenSIPS is a mature implementation of a SIP
server/proxy. It is more than a SIP proxy/router,
as it includes application-level functionalities.
OpenSIPS, as a SIP server, can server as the core
component of any SIP-based VoIP solution.
Atomthreads is a highly portable RTOS and scheduler for real time embedded systems. Made up of a few small C files, it can easily be dropped into any embedded system project that needs threading support. Ports to new CPU architectures require a single assembler file.
prefix-hc11 is an experimental assembler for HC11 microcontrollers. It exclusively uses a prefix notation in expressions and has a mnemonic syntax different to historical HC11 assemblers.
naken430asm provides a development kit for the Texas Instruments MSP430 line of microcontrollers. It currently includes a cross-platform command-line assembler, disassembler, and simulator with no external dependencies.
KCPSM3 Assembler is an alternative implementation of the KCPSM3 assembly language for Xilinx PicoBlaze written in portable C. Its main target is the Linux OS.