The GNU C compiler apparently still permits this, and the VC++ 2005 compiler permits it too, though it issues a Level-4 warning if it’s C code, and a Level-2 warning if it’s C++ code.
a flexible debugger for Linux applications written in C and C++, supports POSIX threads (pthreads), designed for user-space applications, works on the Intel x86 family and the x86_64 (AMD 64) platforms
an arcade action puzzle game where the objective is to get rid of all incoming balls by rearranging their order. Currently it includes 12 different levels and two modes of gameplay. The engine allows for easy custom level creation with unlimited number of paths, different speeds, ball-sizes, and rules.
dual-licensed implementation of SSL. It includes SSL client libraries and an SSL server implementation. It supports multiple APIs, including those defined by SSL and TLS. It also supports an OpenSSL compatibility interface.
a plugin for Emacs, XEmacs, and jEdit which provides code completion, source browsing, and refactorings. It is based on full pre-processing, parsing, and static analysis of sources and works with the C, C++, and Java languages.
a professional development tool for C and C++ providing code completion, source browsing and refactoring. It is "a must have" for understanding legacy code. (for Emacs and XEmacs)
a component system that will provide extensibility and re-usability both inside and between applications, while being portable across platforms (and languages) and having the lowest possible overhead (both in machine resources and programming effort).
an open source viewer for Portable Document Format (PDF) files. he Xpdf project also includes a PDF text extractor, PDF-to-PostScript converter, and various other utilities.
a publish/subscribe and point to point 100% Java based MOM server (message-oriented middleware) which exchanges messages between publishers and subscribers. The message is described with XML-encoded meta information. Messages may contain everything, GIF i
port of the X Window System server to Windows. It shares the same source code base as Cygwin/X, but does not depend on the Cygwin environment or cygwin1.dll. Xming is a fully featured X11 server for Windows that is very simple to install and use.