Free geared software for linux

Q-Gears project is a clone of Squaresofts Final Fantasy 7 game engine.

Q-gears is an attempt to make a clone of Squaresofts Final Fantasy 7 game engine. It is designed to be cross-platform and run on modern operating systems such as Win32 and Linux. In the future this is to serve as a framework for compatibility with other Square games.

Many games after this were created with the same same code base and design philosophy. Written in C++, it uses cross-platform graphics libraries (SDL and OpenGL) along with GCC, a cross platform C/C++ compiler.

It is named after "Gears" which is a wholly inaccurate and incredibly incomplete refrence for the original FF7 engine. The "Q" means nothing, other than its a cool letter to differentiate between the document and the program.

The FlightGear flight simulator project is an open-source, multi-platform, cooperative flight simulator development project. Source code for the entire project is available and licensed under the GNU General Public License.

The goal of the FlightGear project is to create a sophisticated flight simulator framework for use in research or academic environments, for the development and pursuit of other interesting flight simulation ideas, and as an end-user application. We are developing a sophisticated, open simulation framework that can be expanded and improved upon by anyone interested in contributing.

There are many exciting possibilities for an open, free flight sim. We hope that this project will be interesting and useful to many people in many areas.

FlightGear is a free flight simulator project. It is being developed through the gracious contributions of source code and spare time by many talented people from around the globe. Among the many goals of this project are the quest to minimize short cuts and "do things right", the quest to learn and advance knowledge, and the quest to have better toys to play with.

The idea for Flight Gear was born out of a dissatisfaction with current commercial PC flight simulators. A big problem with these simulators is their proprietariness and lack of extensibility. There are so many people across the world with great ideas for enhancing the currently available simulators who have the ability to write code, and who have a desire to learn and contribute. Many people involved in education and research could use a spiffy flight simulator frame work on which to build their own projects; however, commercial simulators do not lend themselves to modification and enhancement. The Flight Gear project is striving to fill these gaps.

There are a wide range of people interested and participating in this project. This is truly a global effort with contributors from just about every continent. Interests range from building a realistic home simulator out old airplane parts, to university research and instructional use, to simply having a viable alternative to commercial PC simulators.

Flight Dynamics Models

With FlightGear it is possible to choose between three primary Flight Dynamics Models. It is possible to add new dynamics models or even interface to external "proprietary" flight dynamics models:

1. JSBSim: JSBSim is a generic, 6DoF flight dynamics model for simulating the motion of flight vehicles. It is written in C++. JSBSim can be run in a standalone mode for batch runs, or it can be the driver for a larger simulation program that includes a visuals subsystem (such as FlightGear.) In both cases, aircraft are modeled in an XML configuration file, where the mass properties, aerodynamic and flight control properties are all defined.

2. YASim: This FDM is an integrated part of FlightGear and uses a different approach than JSBSim by simulating the effect of the airflow on the different parts of an aircraft. The advantage of this approach is that it is possible to perform the simulation based on geometry and mass information combined with more commonly available performance numbers for an aircraft. This allows for quickly constructing a plausibly behaving aircraft that matches published performance numbers without requiring all the traditional aerodynamic test data.

3. UIUC: This FDM is based on LaRCsim originally written by the NASA. UIUC extends the code by allowing aircraft configuration files instead and by adding code for simulation of aircraft under icing conditions.

UIUC (like JSBSim) uses lookup tables to retrieve the component aerodynamic force and moment coefficients for an aircraft... and then uses these coefficients to calculate the sum of the forces and moments acting on the aircraft.

Extensive and Accurate World Scenery Data Base

Over 20,000 real world airports included in the full scenery set.
Correct runway markings and placement, correct runway and approach lighting.
Taxiways available for many larger airports (even including the green center line lights when appropriate.)
Sloping runways (runways change elevation like they usually do in real life.)
Directional airport lighting that smoothly changes intensity as your relative view direction changes.
World scenery fits on 3 DVDs. (Im not sure thats a feature or a problem!) But it means we have pretty detailed coverage of the entire world.
Accurate terrain worldwide, based on the most recently released SRTM terrain data.) 3 arc second resolution (about 90m post spacing) for North and South America, Europe, Asia, Africa, and Australia.
Scenery includes all vmap0 lakes, rivers, roads, railroads, cities, towns, land cover, etc.
Nice scenery night lighting with ground lighting concentrated in urban areas (based on real maps) and headlights visible on major highways. This allows for realistic night VFR flying with the ability to spot towns and cities and follow roads.
Scenery tiles are paged (loaded/unloaded) in a separate thread to minimize the frame rate hit when you need to load new areas.

Accurate and Detailed Sky Model

FlightGear implements extremely accurate time of day modeling with correctly placed sun, moon, stars, and planets for the specified time and date. FlightGear can track the current computer clock time in order to correctly place the sun, moon, stars, etc. in their current and proper place relative to the earth. If its dawn in Sydney right now, its dawn in the sim right now when you locate yourself in virtual Sidney. The sun, moon, stars, and planets all follow their correct courses through the sky. This modeling also correctly takes into account seasonal effects so you have 24 hour days north of the arctic circle in the summer, etc. We also illuminate the correctly placed moon with the correctly placed sun to get the correct phase of the moon for the current time/date, just like in real life.

Flexible and Open Aircraft Modeling System

FlightGear has the ability to model a wide variety of aircraft. Currently you can fly the 1903 Wright Flyer, strange flapping wing "ornithopters", a 747 and A320, various military jets, and several light singles. FlightGear has the ability to model those aircraft and just about everything in between.

FlightGear has extremely smooth and fluid instrument animation that updates at the same rate as your out-the-window view updates (i.e. as fast as your computer can crank, and not artificially limited and chunky like in some sims.)

FlightGear has the infrastructure to allow aircraft designers to build fully animated, fully operational, fully interactive 3d cockpits (which even update and display correctly from external chase plane views.)

FlightGear realistically models real world instrument behavior. Instruments that lag in real life, lag correctly in FlightGear, gyro drift is modeled correctly, the magnetic compass is subject to aircraft body forces -- all those things that make real world flying a challenge.

FlightGear also accurately models many instrument and system failures. If the vacuum system fails, the HSI gyros spin down slowly with a corresponding degradation in response as well as a slowly increasing bias/error.

Moderate Hardware Requirements

The intention of FlightGear is to look nice, but not at the expense of other aspects of a realistic simulator. Our focus is not on competing in the "game" market and not on the ultra-flashy graphic tricks.

The result is a simulator with moderate hardware requirements to run at smooth frame rates. You can be reasonably happy on a $500-1000 (USD) machine (possibly even less if you are careful) and dont necessarily need $3000 (USD) worth of new hardware like you do with the many of the newest games.

That said, the more hardware you throw at FlightGear, the better it looks and runs, so dont feel like you have to chuck your expensive new hardware if you just purchased it. :-)

Internal Properties EXPOSED!

FlightGear allows users and aircraft designers access to a very large number of internal state variables via numerous internal and external access mechanisms. These state variables are organized into a convenient hierarchal "property" tree.

Using the properties tree it is possible to monitor just about any internal state variable in FlightGear. Its possible to remotely control FlightGear from an external script. You can create model animations, sound effects, instrument animations and network protocols for about any situation imaginable just by editing a small number of human readable configuration files. This is a powerful system that makes FlightGear immensely flexible, configurable, and adaptable.

Networking options

A number of networking options allow FlightGear to communicate with other instances of FlightGear, GPS receivers, external flight dynamics modules, external autopilot or control modules, as well as other software such as the Open Glass Cockpit project and the Atlas mapping utility.

A generic input/output option allows for a user defined output protocol to a file, serial port or network client.

A multi player protocol is available for using FlightGear on a local network in a multi aircraft environment, for example to practice formation flight or for tower simulation purposes.

The powerful network options make it possible to synchronize several instances of FlightGear allowing for a multi-display, or even a cave environment. If all instances are running at the same frame rate consistently, it is possible to get extremely good and tight synchronization between displays.

Flight Gear and its source code have intentionally been kept open, available, and free. In doing so, we are able to take advantage of the efforts of tremendously talented people from around the world. Contrast this with the traditional approach of commercial software vendors, who are limited by the collective ability of the people they can hire and pay. Our approach brings its own unique challenges and difficulties, but we are confident (and other similarly structured projects have demonstrated) that in the long run we can outclass the commercial "competition."

Contributing to Flight Gear can be educational and a lot of fun. A long time developer, Curtis Olson, had this to say about working on Flight Gear:

Personally, Flight Gear has been a great learning experience for me. I have been exposed to many new ideas and have learned a tremendous amount of "good stuff" in the process of discussing and implementing various Flight Gear subsystems. If for no other reason, this alone makes it all worth while.

Typeface is blogging software geared toward developers who wish to blog about their development cycle.
This blog makes it easy to convey thoughts and ideas about programming by posting syntax highlighted code snippets.
The project supports the metaweblog API, extensive caching for speed, and captcha image verification to fight against comment spam.
Enhancements:
- A category editor was added.
- Minor code cleanup was done.
- A possible memory leak was fixed.
- The order of how archived lists display was fixed.
- Page titles are set depending on the subject or page name.
- A few missing dependencies were fixed.

jGetFile project is geared towards mass downloading specifically non-html files from the web. Web crawlers and website downloads are widely available and work very well. Not all web-based file crawlers are equal however.

Few file crawers handle this href scenario: < a href="http://www.foo.com?url=http://youreallywantthislink.com/files" >< /a > jGetFile was engineered to be able to handle as many extraneous href configurations as possible. Although it does not handle all possible cases, more will be supported in future releases.

jGetFile supports a highly configurable means to filter the acceptance of links within the program. A user can use the -i or -e options to have the program only traverse links that start with the addresses the user specified, or to exclude links that start with the specified addresses.

Alternatively, for the powerusers, one can specify a BeanShell script through the -als option. This allows for abritrarily complex rules to be specified for accepting links, like accept only links at depth 1 that begin with www.blah.com, exclude links at level 2 that begin with www.foo.com, and exclude links at level 2 that contain word cat. The depth variable is currently not available to custom scripts, but will be in the next release.

There is no gui in the works, and because of the intended simplicity of this program, one is not planned in the future either. Also, jGetFile is not intended to replace wget, although its initial features were based on wget. jGetFile has the single goal of downloading files fast and efficiently from the web.

HyperLinked Text project is a Wiki-esque text file format and accompanying viewer.

HyperLinked Text (Hylt) is both a file format and a viewer for that format.

It uses (almost) flat text files to generate a Wiki-style database of hyperlinked pages, without either the complex markup of HTML or the esoteric database formats in which most Wikis store data.

It is geared towards users who desire a minimal interface between them and their data or like to store their data in formats which can be meaningfully stored in version control systems.

It was developed originally to match both of those goals, specifically for individuals writing fiction and wishing to track inter-character and inter-location relationships.

Sorcerer is a source-based Linux distribution for system administrators. The sources are downloaded directly from software authors homepages and mirrors.

Then, they are compiled with the architecture and optimizations that the system administrator specifies.

Finally, it is installed, tracked, and archived for easy removal and upgrades. Sorcerer has both command line and menu driven source mangement programs.

The OpenAI site is centered around an Open Source project and community involving artificial intelligence. The term "Open Source" means that the source code for the project is available for free and can be used by others free of charge.

Artificial Intelligence refers to the general aim of intelligent computing, making machines think and learn. The project itself is the creation of a set of tools that are considered to be models of human intelligence. These tools are intended to be integrated into programs or used stand alone for research.

The project itself is geared toward developing a specification for AI related tools. The specification will allow these tools to operate in a modular fashion and be highly interoperable with other tools adhering to the specification.

OpenAI will also provide the details of the specification online as it develops so that the community can help in its creation by giving insight and criticism.

Technologies like XML and CORBA will be used for configuration, persistence and communication. Currently well be implementing all the tools in Java and C++, but will accept tools written in any language as long as they adhere to the OpenAI standard.