BRL-CAD is a powerful constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, and image and signal-processing tools.
U++ is a C++ cross-platform rapid application development suite focused on programmers' productivity without sacrificing runtime performance. Based on strictly deterministic design, it provides a viable alternative to garbage-collected platforms, even for business logic oriented problems.
freeglut is intended to be a 100% plug-compatible clone, and is released under the Xfree license. The GLUT (OpenGL Utility Toolkit) is a widely used library for doing window control, keyboard, and mouse input, and other basic functions for OpenGL programs. However, GLUT is not OpenSourced - although it's source code is available under a somewhat ill-defined set of restrictions. Hence, 'freeglut'.
The ANSI/ISO C++ specifcation includes a standard C++ library, also known as the STL. GCC by default comes with an implementation that does not comply with this standard, but instead partly implements an older version. STLport is a freely available implementation, based on the SGI STL implementation. It is fully-compliant, supported, and very fast. It includes special debugging facilities and interesting and useful extensions to the standard.
Monica is a monitor calibration tool using the FLTK library. It works as frontend to xgamma to alter the gamma correction for XFree86 or Xorg. The black point, gray, and color blocks help to find usable settings for a target of 2.2 gamma, the Web, and sRGB standard. FLTK libs are not needed for the binary.
The NCBI C++ Toolkit provides portable libraries and applications for assisting genetic science. These include libraries for networking, SQL and BerkeleyDB access, CGI and HTML handling, ASN.1 and XML handling, sequence alignment engines, sequence retrieval engines, BLAST database engines, FLTK and OpenGL graphics toolkits, and basic system utilities.
The Simple Sockets Library makes sockets easy to use and comes as public domain source code. It resembles C's file I/O, uses whatever port is available, has named servers and port reuse, streaming/blocking sockets used, polling support, blocking/selection support via numerous functions, timeout control and firewall support.