The ADAPTIVE Communication Environment (ACE) is an object-oriented (OO) C++ framework that helps you develop and deploy high-performance networked applications faster and with less code to write and maintain. ACE is especially useful for systems that use network and/or inter-process communications and that take advantage of multithreading. While the ACE source code is free, that's not the only way you save money with ACE. ACE's wrappers and higher-level patterns help you develop your software quickly and portably, helping you to complete your projects on time and within budget.
Adflib is a free, portable, open and documented implementation of the Amiga filesystem. ADFlib and the related documentation ADF FAQ allow you to easily access media formatted with the Amiga filesystem from your application. This C library is delivered with a little utility like unZip, but for ADF dump files created with UAE, the amiga emulator. The ADF FAQ explains in details the Amiga filesystem.
CUPS is a standards-based printing system for Mac OS X and other Unix-like operating systems. It provides the System V and Berkeley command line interfaces, and uses the Internet Printing Protocol ("IPP") as the basis for managing print jobs and queues. The Line Printer Daemon (LPD) Server Message Block (SMB), and AppSocket (a.k.a. JetDirect) protocols are also supported with reduced functionality. CUPS adds network printer browsing and PostScript Printer Description ("PPD") based printing options to support real world printing.
The Advanced Linux Sound Architecture is composed of several parts. The first is a fully modularized sound driver which supports module autoloading, devfs, isapnp autoconfiguration, and gives complete access to analog audio, digital audio, control, mixer, synthesizer, DSP, MIDI, and timer components of audio hardware. It also includes a fully-featured kernel-level sequencer, a full compatibility layer for OSS/Free applications, an object-oriented C library which covers and enhances the ALSA kernel driver functionality for applications (client/server, plugins, PCM sharing/multiplexing, PCM metering, etc.), an interactive configuration program for the driver, and some simple utilities for basic management.