FCML, the Free Code Manipulation Library, is a general-purpose machine code manipulation library for i386 and amd64 architectures. It includes an assembler and disassembler, instruction renderers and parsers, and supports Intel and AT&T (gas) syntax.

FFindex is a very simple index/database for huge amounts of small files. The files are stored concatenated in one big data file, separated by '\0'. A second file contains a plain text index, giving name, offset and length of the small files. The lookup is currently done with a binary search on an array made from the index file.

Fifechan is a lightweight cross platform GUI library written in C++ specifically designed for games. It has a small yet powerful built in set of extendable GUI Widgets allowing users to create virtually unlimited types of widgets.

The default STL allocator model has various flaws, for example you cannot easily share a single allocator for multiple types. This library is one of many proposed solutions for the shortcomings of the standard allocator, which unlike many other solutions does not require changes in the STL itself.

The g15daemon client library allows applications to use LCD of the Logitech G15 keyboard or Z10 speakers under control of g15daemon.

Gammu is command line utility and library to work with mobile phones from many vendors. Support for different models differs, but basic functions should work with majority of them. Program can work with contacts, messages (SMS, EMS and MMS), calendar, todos, filesystem, integrated radio, camera, etc. It also supports daemon mode to send and receive SMSes.