Faxpp is a small, fast and conformant XML pull parser written in C with an API that can return strings in any encoding including UTF-8 and UTF-16.

Protothreads is a programming model invented by Adam Dunkels that combines the advantages of event-driven (sometimes also called state machine) programming and threaded programming. The main advantage of the event-driven model is efficiency, both speed and memory usage. The main advantage of the threaded model is algorithm clarity. Protothreads gives you both. A protothread is an extremely lightweight thread. As with event-driven programming, there is a single stack; but like threaded programming, a function can (at least conceptually) block. This protothreads implementation: ...

fuLisp is a simple lisp interpreter. It provides a parser transferring strings into lists and an interpreter that evaluates lists according to the rules of lisp. The lisp dialect supported is the very core of most of the dialects around. There is only support for the very basic functions, but those allow to implement whatever functionality is needed in lisp itself. It is targeted at providing a minimalistic lisp environment that is turing - complete nevertheless....

A simple library implementing a thread pool in C, using POSIX threads. The library has been tested to work with both LinuxThreads and NPTL. Features: multiple worker pools, manager-free design (no thread overhead), asynchronous cancellation safe design, fork-safe design, very few dependencies, automated unit testing, well-documented....

There are no good, maintained C libraries to handle SPF in UNIX.
There is a good Python one.
So, let's port it!

The current status is:

it's ready for testing, but probably not for production use, until it's tested some more.
- It works like PySPF ( no divergences in over 350 tests). ...

The Make Controller Kit is an open source hardware and software project by MakingThings. It's simple and robust enough for beginners, and powerful enough for experienced developers. It includes a full-featured IO controller with advanced communications - USB, Ethernet, serial, SPI, CAN and more. ...

cfunge is a fast interpreter (coded in C) for the esoteric language Befunge98. It is standard conforming. cfunge is written to be able to run on any C99 POSIX system.

CloudI is an open-source private cloud computing framework for efficient, secure, and internal data processing. CloudI provides scaling for previously unscalable source code with efficient fault-tolerant execution of C/C++, Erlang, Java, Python, or Ruby services....

OpenAL mixer aims to provide a multiplatform API built on top of OpenAL to get/set volume values (including support for capture devices) and list, select and mute input and output lines.

A toolbar editor for Visual Studio. It can modify, add and create buttons, images and all that is needed for a toolbar.