Gadu-Gadu is an instant messaging program, very popular in Poland. libgadu is a Gadu-Gadu protocol implementation library.

Libghemical is the basis of Ghemical, a GNOME Molecular Modelling Application.

This package provides a GNU Emacs major mode for editing lex, yacc files, as well as their extension formats like flex, bison, and jison. It provides flex-mode, bison-mode, and jison-mode to add syntax highlighting and electric indentation when editing the corresponding types of files.

The FVDE format is used by Mac OS X, as of Lion, to encrypt data on a storage media volume.

libfsxfs is a library to access the SGI X File System (XFS).

Types and instances, and marshalling between Integer and Rational and the corresponding GMP types, along with raw foreign imports of GMP functions. Allows FFI to GMP code (whether in GMP itself or in third-party code that uses GMP).