Rapid applications development tool and libraries for FPC
The Lazarus IDE is a stable and feature rich visual programming environment for the FreePascal Compiler. It supports the creation of self-standing graphical and console applications and runs on Linux, FreeBSD, MacOSX and Windows.
Free 32/64/16-bit multi-platform Pascal and Object Pascal compiler
A 32/64/16-bit Pascal compiler for Win32/64/CE, Linux, Mac OS X/iOS, FreeBSD, OS/2, Game Boy Advance, Nintendo NDS and DOS; semantically compatible with Delphi, Borland Pascal and Mac Pascal (partially) with extra features, e.g. operator overloading.
gPhoto is a program and library framework that lets users download pictures from their digital cameras. The libgphoto2 library gives you access to hundreds of models of digital cameras on several platforms. GIT repo and Issue tracker lives at https://github.com/gphoto/ these days.
SAGA - System for Automated Geoscientific Analyses - is a Geographic Information System (GIS) software with immense capabilities for geodata processing and analysis. SAGA is programmed in the object oriented C++ language and supports the implementation of new functions with a very effective Application Programming Interface (API). Functions are organised as modules in framework independent Module Libraries and can be accessed via SAGA’s Graphical User Interface (GUI) or various scripting environments (shell scripts, Python, R, ...). Please provide the following reference in your work if you are using SAGA: Conrad, O., Bechtel, B., Bock, M., Dietrich, H., Fischer, E., Gerlitz, L., Wehberg, J., Wichmann, V., and Boehner, J. (2015): System for Automated Geoscientific Analyses (SAGA) v. 2.1.4. Geosci. Model Dev., 8, 1991-2007, doi:10.5194/gmd-8-1991-2015. http://www.geosci-model-dev.net/8/1991/2015/gmd-8-1991-2015.html.
Open Source Solid Modeling CAD
BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
A full featured cross-platform image library
Developer's Image Library (DevIL) is a cross-platform image library utilizing a simple syntax to load, save, convert, manipulate, filter and display a variety of images with ease.
A multi-platform software synthesiser emulating (somewhat inaccurately) pre-GM MIDI devices such as the Roland MT-32, CM-32L, CM-64 and LAPC-I. In no way endorsed by or affiliated with Roland Corp. Source hosted at: http://www.github.com/munt/
ANSI C functions and macros for flexible logging to files and other destinations. It is modeled after the Log for Java library (http://www.log4j.org), staying as close to their API as is reasonable. Intended for use in time-space critical environments
The PHP script engine for Java. --- Run PHP applications within any J2EE server or servlet engine and/or connect script engines like PHP with Java or .NET back ends efficiently.
gtkpod is a platform independent GUI for Apple's iPod using GTK. It allows you to import your existing iTunes database, add songs, podcasts, videos and cover art, and to edit ID3 tags. libgpod is a library allowing direct access to the iPod's conte
Kiax is a softphone (soft phone, VoIP client) with a simple and comfortable user interface for making VoIP calls to Asterisk PBX. It depends on the iaxclient library to use Asterisk's IAX2 protocol for easy call configuration and audio setup.
COBOL compiler for the PC x86-32 platform.
An open source COBOL compiler for the PC x86-32 platform. Generates GNU assembler and requires GCC to produce a binary. Supports Linux, BSD and MinGW 32 bit platforms.
libircclient is a small but powerful library, which implements client-server IRC protocol. It has all features needed to create your own IRC client or bot, including multi-threading support, sync and async interfaces, CTCP/DCC support, colors, SSL connections and so on.
The Heirloom Project provides standard Unix utilities.
The OSALP is a C++ class library that contains everything one needs to build an audio application. It contains a powerful chaining concept so programmers can build an audio application by selecting the building blocks they need.
Twin is a "retro" program for embedded or remote systems
Twin is a text-mode window environment. It supports mouse and multiple windows, has a built-in terminal emulator and window manager, and can serve as display for client applications. Its retro look-and-feel comes with very modern features: it is best described as a VNC-like server, that can use a variety of displays - all with mouse support: from a plain text terminal, to a Linux console, to a full kde, gnome or X11 desktop. Source code hosted at https://github.com/cosmos72/twin
A lightweight cross platform IP telephony client using the IAX protocol, designed for use with the asterisk open source PBX.
Ficl is a lightweight, efficient language designed to be incorporated into other programs, including (especially) firmware based systems. Ficl includes a simple but capable object model that can wrap existing data structures. Applications: scripting,
C++ class library for programming interactive 3D graphics with OpenGL
Leafnode is a caching Usenet news proxy that enables online newsreaders to read news off-line and aggregates news from various NNTP servers into one. It is designed for full-automatic maintenance, and IPv6 enabled.
pam_mount is a Pluggable Authentication Module that can mount volumes for a user session (login). Supports mounting local filesystems of any kind the normal mount utility supports, with extra code to better support CIFS, FUSE, various crypto, and more.
User Defined Library for InterBase / Firebird / Yaffil for Windows and Unix. Written on C++.
The DCHK project contains a client implementation of RFC 5144 in C/C++, which can be used to check the availability of domains. It is divided into a C/C++ library, a command line client and a GUI.
2D/3D Scene Graph rendering engine for Linux/Unix/Win32 layered atop OpenGL. Supports stereoscopy, volume rendering, 2D/3D texture mapping, picking, LOD and view-dependent operations, cross-platform text, constant-rate rendering and image-based data.
Open-source, cross-platform 3D rendering engine for .NET and Mono. The Axiom Engine is a high-performance C# port of the powerful OGRE engine and provides full support for DirectX, OpenGL and XNA on Windows, Linux, Android, iPhone and Windows Phone.