PNG is an almost-pure-ruby PNG library. It lets you write a PNG without any C
libraries.
Ebview is a gtk based tool to access CD-ROM dictionaries of
EPWING, EB, EBG,EBXA, EBXA-C formats.
Clam AntiVirus is an anti-virus toolkit for UNIX. This module provide a simple
interface to it's C API.
R-cran-gpclib is a general polygon clipping routines for
R based on Alan Murta's C library.
python-librtmp is a Python interface to librtmp. It uses cffi to interface with
the C library librtmp.
Profanity is a console based XMPP client written in C using ncurses and
libstrophe, inspired by Irssi
Lopster is a Napster client with Multiserver and Multisource support
for Linux/Unix written in C and based on GTK.
Nitrogen is a background browser and setter for X windows. It is written
in C++ using the gtkmm toolkit.
LibWapcaplet is a string internment library, written in C.
It provides reference counted string interment and rapid string comparison
functionality.
Work with XML files using a simple, consistent interface. Built on
top of the 'libxml2' C library.