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The Netrinjo Engine is a SDL and OpenGL based game engine. It supports many classes for a graphical user interface, peer-to-peer and client-server networking and simple HTTP server functionality. Currently the engine is working under Linux.
OOB/N1 is a PHP5 Framework. Its meant to work under IIS/Apache and Win/Linux enviroments without modifications.
This framework is not a simple Template/DB pack, but a complete engine to develop PHP-Applications.
The CCC Language is yet another programming language. It is platform-independent, compact, and robust. Supports many SQL engines, has own ISAM DB engine, has terminal mode and more UI-s, is object-oriented, but it is compiled and not interpreted.
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Middlegen is a free general-purpose database-driven code generation engine based on JDBC, Velocity, Ant and XDoclet. If you already have a database, you can use Middlegen to generate EJB (CMP 2.0), Hibernate, JDO and JSP/Struts source code.
FireAnt is an Eclipse plugin for modeling complex remote deployment and configuration processes. It allows developers to model the deployment and execution of groups of packages and configuration scripts on remote targets. It provides a deployment engine
The S-Engine is an alternative skinnable GUI (Graphical User Interface) for the Turing programming language. The S-Engine uses image manipulation to create modern looking buttons and GUI objects. (Turing 4.0.4c or higher is required)
Nennius, an advanced, object-oriented application engine for building PHP applications. Provides MVC framework for building all aspects of a data entry application including searching and filtering, lookup columns and more.
An engine/framework for isometric games (like japanese RPGs) for mobile devices supporting J2ME (MIDP 1.0). This engine will manage maps, objects and characters.
A full Action-RPG using this library is going to be released... Stay tuned...
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The Simulus Game Engine is a cross-platform, flexible, and easy-to-use game engine and development environment. Written in C++, supports multiple APIs, runs under Linux and Windows.
FreeMMG 2 is a C++ game network engine based on a hybrid client-server and peer-to-peer overlay network, aimed at supporting avatar-based games (RPGs or shooters) in a massively multiplayer context.
1st 3D game engine built in C# for .NET, Visual3D Engine's predecessor
The first 3D game engine built in C# for .NET, predecessor to the Visual3D Game Engine (https://www.poweraccess.net/visual3d-game-engine), an All-in-One Game Development Tool for Next-Gen 3D Games, MMOs, Simulations and Virtual Worlds powered by Microsoft XNA.
Ajax Pages is a scripting template engine that enables rapid development of Ajax Web-based Applications, just like GMail, Google Maps, A9 and Backpack, but without having to manipulate complicated Document Object Models to make things dynamic.
DEPOT is a project manager for jDoom addons (to be expanded for other ports). While designing an add-on, users often accumulate many different files, making it hard to manage them. DEPOT is a solution for this, providing easy ways to work with content.
Coefficient is a project-based collaboration platform deployable as either a J2EE or a Web application. It provides collaboration tools as hot deployable modules. It also provides a workflow engine to help guide projects through their development cycle.
XDoclet is an extended Javadoc Doclet engine. It's a generic Java tool that lets you create custom Javadoc @tags and based on those @tags generate source code or other files (such as xml-ish deployment descriptors) using a template engine it provides.
The 'Nameless Allegro Engine' is a several layers of C++ abstraction. It is intended to abstract the entire game development process all the way from Allegro to the finished game.
OpenCASCADE Sketcher is a C++ library for creating of 2D Sketcher based on OpenCASCADE (www.opencascade.org) library. This sketcher allows to create 2D sketches by using snaps, geometric primitives. It can be used for creating CAD applications.
This library is a layer that pretends to simplify access to Bamboo.Prevalence .NET Prevalence Engine, with methods like "save(object)" and "load()". To save an object, you just use the save(object) and it will be stored to you.
A skeletal animation library designed to load and play skeletal animations. It supports models that are composed of several swappable meshes bound to a single skeleton that can be driven by multiple animations and has an export plug-in for Maya.
Open source kit/library collection for use in developing RPGs. Libraries for characters, items, maps, etc. As well as a development engine that ties it all together.
Xconq is an engine for turn-based strategy games. Variety of game genres run under Xconq: historical, sci-fi, fantasy, and modern. AIs. Network games. Multiple UIs and platforms. Easy-to-learn game design language. Large games library available