PF

Packet Filter (from here on referred to as PF) is OpenBSD's system for filtering TCP/IP traffic and doing Network Address Translation. PF is also capable of normalizing and conditioning TCP/IP traffic...
Language(s): C
Operating system(s): OpenBSD
License: BSD license

RawTherapee

RawTherapee is a cross-platform raw image processing program. RawTherapee involves the concept of non-destructive editing, similar to that of some other raw conversion software. Adjustments made by th...
Language(s): C++ gtkmm
Operating system(s): Linux, FreeBSD, Windows, Mac OS X
License: GPLv3 (as of version 3.0 alpha 1), proprietary (up to version 2.4.1)

Ring

Ring is a free and universal communication platform which preserves the users' privacy and freedoms. Ring is free software for universal communication which respects the freedoms and privacy of its us...
Language(s): C, C++
Operating system(s): Linux, FreeBSD, Microsoft Windows, OS X, Android
License: GNU General Public License v3

Scilab

Scilab is free and open source software for numerical computation providing a powerful computing environment for engineering and scientific applications. Scilab is released as open source under the Ce...
Language(s): Scilab, C, C++, Java, Fortran
Operating system(s): BSD, FreeBSD, Linux, Mac OS, Windows
License: GPLv2

Scribus

Scribus is a desktop publishing (DTP) application, released under the GNU General Public License as free software. It is based on the free Qt toolkit, with native versions available for Unix, Linux, B...
Language(s): C++
Operating system(s): Windows, Linux/UNIX, Mac OS, OS/2 Warp 4/eComStation, FreeBSD, PC-BSD, OpenBSD, NetBSD, Solaris, OpenIndiana, GNU/Hurd, Haiku
License: GNU LGPL 2.1, MIT, 3-clause BSD, Public domain