The CELT codec is an experimental audio codec for use in low-delay speech and audio communication.

QuteCom is the new name for the open source softphone previously known as WengoPhone, a standards-based softphone and multi-protocol IM client.

It is a community project focussed on communication over IP, including VoIP, instant messaging and video phonecalls....

TinyCC (aka TCC) is a small but hyper fast C compiler. Unlike other C compilers, it is meant to be self-sufficient: you do not need an external assembler or linker because TCC does that for you.
TCC compiles so fast that even for big projects Makefiles may not be necessary....

EJBCA is a fully functional Certificate Authority. Based on J2EE technology it constitutes a robust, high performance and component based CA. Both flexible and platform independent, EJBCA can be used standalone or integrated in any J2EE application.

EJBCA is an enterprise class PKI, meaning that you can use EJBCA to build a complete PKI infrastructure for your organisation. If you only want to issue a few single certificates for testing, there are probably options that will get you started quicker, but if you want a serious PKI we recommend EJBCA....

Teeworlds is A retro multiplayer shooter, DDRace is a Mod for Teeworlds which needs co-operation to finish races:

This is a mod (DDRace) and it's for the game Teeworlds and it's being maintained by GreYFoX@GTi & btd with the help of others like heinrich5991, noother & Floff, in the previous versions 3da and Fluxid....

Agar is a modern open-source, cross-platform toolkit for graphical applications implemented in C, C++ and Ada (with bindings to other languages in development). Designed for ease of integration, it follows the philosophy of building the GUI around the application and not the other way around. Unlike most other GUI toolkits, Agar takes maximum advantage of hardware graphics acceleration when it is available via OpenGL, but it also supports traditional framebuffer interfaces such as SDL direct video....

The serf library is a C-based HTTP client library built upon the Apache Portable Runtime (APR) library. It multiplexes connections, running the read/write communication asynchronously. Memory copies and transformations are kept to a minimum to provide high performance operation....

Notion is a tiling, tabbed window manager for the X window system:

• Tiling: you divide the screen into non-overlapping 'tiles'. Every window occupies one tile, and is maximized to it
• Tabbing: a tile may contain multiple windows - they will be 'tabbed' ...

netsniff-ng is is a free, performant Linux network analyzer and networking toolkit.

The gain of performance is reached by zero-copy mechanisms, so that the kernel does not need to copy packets from kernelspace to userspace and vice versa.

netsniff-ng consists of much more than only a network analyzer. Next to the zero-copy sniffer itself, further tools like trafgen, a powerful zero-copy network packet generator, or ifpps, a tool that provides top-like kernel networking statistics, and curvetun, a lightweight curve25519-based multiuser IP tunnel, are being shipped....

XML-RPC is a quick-and-easy way to make procedure calls over the Internet. It converts the procedure call into XML document, sends it to a remote server using HTTP, and gets back the response as XML.

This library provides a modular implementation of XML-RPC for C and C++....