ananke

aseprite

bsnes-c++98-libretro

bsnes-libretro

cardpics

set of free cards sets

cegui

Crazy Eddie's GUI System

ceimageseteditor

cel

A game entity layer based on Crystal Space

cel-ps

Portable 3D Game Development Kit written in C++

celayouteditor

cheapglk

A stdio implementation of the Glk API

clanlib

multi-platform game development library

crystalspace

Portable 3D Game Development Kit written in C++

crystalspace-ps

Portable 3D Game Development Kit written in C++

etrophy

fareditor

A program for creating and manipulating .far files for games Cytadela

flatzebra

A generic game engine for 2D double-buffering animation

flinker

GBA cart writing utility by Jeff Frohwein

game-editor

2D Game editor

garglk

A typographically beautiful Glk library

ggz-client-libs

The client libraries for GGZ Gaming Zone

gigi

gigi-fo

glk-headers

Headers for the Glk API

glkloader

A Glk library which dynamically loads another Glk library

glkterm

An ncurses implementation of the Glk API

glktermw

An ncurses implementation of the Glk API with Unicode support

gmqcc

gnome-inform7

GNOME user interface for Inform 7

gtkradiant

FPS level editor

guichan

a portable C++ GUI library designed for games using Allegro, SDL and/or OpenGL

hawknl

A cross-platform network library designed for games

hdl_dump

game installer for playstation 2 HD Loader

hlsdk

Half-Life Software Development Kit for mod authors

irrlicht

open source high performance realtime 3D engine written in C++

KXL

Development Library for making games for X

laevateinn

libggz

The GGZ library, used by GGZ Gaming Zone

libgrapple

A high level network layer for multiuser applications

libmaitretarot

backend library for the maitretarot games

libmt_client

backend library for the maitretarot clients

libnw

Tools and libraries for NWN file manipulation

libtpclient-py

A Python library for development of Thousand Parsec game clients

libtpproto-cpp

A C++ protocol library for Thousand Parsec game clients

libtpproto-py

A Python protocol library for Thousand Parsec game clients/servers

libtuxcap

mercator

WorldForge library primarily aimed at terrain.

meshmagick

mygui

neoengine

An open source, platform independent, 3D game engine written in C++

neotools

Various development tools for NeoEngine

netradiant

newton

an integrated solution for real time simulation of physics environments

ode

Open Dynamics Engine SDK

ogre

Object-oriented Graphics Rendering Engine

ogre-paged

ogreal

ogrenewt

ois

Object-oriented Input System - A cross-platform C++ input handling library

opal

openscenegraph

Open source high performance 3D graphics toolkit

paklib

library for accessing Quake pak files

physfs

Abstraction layer for filesystem and archive access

poker-eval

A fast C library for evaluating poker hands

ps2-packer

another ELF packer for the PS2

pyogre

quake4-sdk

Quake4 SDK

raknet

renpy

Visual novel engine written in python

renpy-modules

Modules for renpy

simgear

Development library for simulation games

simgear-cs

snesfilter

snesreader

supergameboy

supertux-editor

t4k-common

techne

tiled

tiled-qt

vamos

an automotive simulation framework

wfmath

Worldforge math library

xglk

An X Window implementation of the Glk API

ananke

gnome-inform7

ogreal

aseprite

gtkradiant

ogrenewt

bsnes-c++98-libretro

guichan

ois

bsnes-libretro

hawknl

opal

cardpics

hdl_dump

openscenegraph

cegui

hlsdk

paklib

ceimageseteditor

irrlicht

physfs

cel

KXL

poker-eval

cel-ps

laevateinn

ps2-packer

celayouteditor

libggz

pyogre

cheapglk

libgrapple

quake4-sdk

clanlib

libmaitretarot

raknet

crystalspace

libmt_client

renpy

crystalspace-ps

libnw

renpy-modules

etrophy

libtpclient-py

simgear

fareditor

libtpproto-cpp

simgear-cs

flatzebra

libtpproto-py

snesfilter

flinker

libtuxcap

snesreader

game-editor

mercator

supergameboy

garglk

meshmagick

supertux-editor

ggz-client-libs

mygui

t4k-common

gigi

neoengine

techne

gigi-fo

neotools

tiled

glk-headers

netradiant

tiled-qt

glkloader

newton

vamos

glkterm

ode

wfmath

glktermw

ogre

xglk

gmqcc

ogre-paged