Free jet software for linux

Jet Set Willy X is a game for Sinclair ZX Spectrum computer, playable on emulators. Jet Set Willy X is heavily inspired by Jet Set Willy.
There are no guardians and ropes, but the animation is twice as fast, absolutely smooth, and there is a 2-channel background tune.
The rooms are 20 characters high instead of 16, and can have a more complicated combination of graphics characters. There are 69 rooms and over 390 items to collect.
Differences from Jet Set Willy
- There are no guardians, however there are places where you are probably going to swear even without them.
- The guy walks twice as fast, the animation is smooth 50Hz instead of 25Hz, the guy has twice as much positions and the sprites are a bit different
- There are no ropes
- There is a 2-channel tune instead of 1-channel
- The guy can fall through a 1-character hole
- The rooms are 20 chars high instead of 16
- There are much more available different characters in one room
- The attributes in the room are not used to encode meaning of the characters, they can be set arbitrarily
- What happens after the game is completed is a bit more fun
- The jump looks a bit different
- When the guy enters a room from sideways, he doesnt start 1 character away from the edge, but at the edge
- The kill and collect sounds are different
- The kill and collect events generate an effect in the border
- The main voice of the tune continues playing during the kill or collect sound
- The initial scrolling of text is pixel-smooth
- There are 69 rooms and over 390 items to collect
The screenshot and the description are released under the terms of GFDL license.

CLARAty application is a coupled layer architecture for robotic autonomy.
CLARAty stands for Coupled-Layer Architecture for Robotic Autonomy. It is a collaborative effort among four institutions: Jet Propulsion Laboratory, NASA Ames Research Center, Carnegie Mellon, and the University of Minnesota.
CLARAty is a framework that promotes reusable robotic software. It was designed to support heterogeneous robotic platforms and integrate advanced robotic capabilities from multiple institutions. Consequently, its design had to be portable, modular, flexible and extendable.
We are in the process of releasing most of the CLARAty infrastructure and several of its algorithms that have been approved for public release. Our objective is to engage the robotic community in the development and advancement of surface mobility and robotic control algorithms for challenging environments.
Vision:
- To provide a flexible and reusable robotic software framework to support the development and integration of advanced robotic technologies under the Mars Technology Program and other NASA programs. CLARAty also promotes the interoperability of components and algorithms on heterogeneous robotic platforms.
Mission:
- Establish a working group of roboticists from NASA and partnering universities.
- Capture requirements for robotic capabilities
- Develop and document a flexible framework to support advanced technologies on multiple robots.
- Prototype proposed framework to demonstrate improved capability over legacy systems
- Adapt to a number of robotic platforms and capture lessons learned
- Revise, improve, and document the framework
- Disseminate to the robotics community and engage for future enhancements.

Openchange project intends to provide an Open-Source implementation of Microsoft Exchange Server 2003 under Unix Platforms.
The Openchange Project is developed in C language under the BSD license, and will primary work on NetBSD, OpenBSD, FreeBSD and Linux platforms. The project time line has been defined to approximatively one year, and we believe the project will be in a complete stable state at this time.
Openchange wishes to integrate the enterprise working environment and to substitute to an Exchange Server in a transparent way, so final users may continue to use Outlook, or any other mail client.
We also intend to provide to network administrators an easy solution to migrate Exchange databases into Openchange ones and reversely. And last but not least, we work so developers may reuse our sources in a smart way.
The project is divided into 4 parts :
- The OpenChange Library
- The OpenReverse Library
- The Documentation Framework
- The Openchange specifications
The OpenChange Library
This library includes all the requests managing the identification process, the data flow, and all the other requirements needed to permit the communication between an Outlook client and an Exchange Server. It can be used either to develop another Exchange-like server or client.
The OpenReverse Library
Due to legal restriction, the Openchange Server wont reuse the Microsoft Jet Database file format. Instead, we provide a library making easy to parse headers, retrieve the data, calculate checksum and more generally to offer a abstract migration tool to other user defined backends. This library can also be used for basics to develop a repair database tool.
The Documentation Framework
In the documentation framework, you will find all our research results. The subjects may concern the Exchange Internals or treat of a related subject. We wants to provide the most valuable information so our work can be shared with developers community.
The OpenChange Specifications
At last, we will provide the complete specifications of OpenChange in a printable way. This major document of the OpenChange team will help new developers to understand how Exchange Server works, how we implemented our APIs to make OpenChange, Exchange compatible. Around this main development, you will find several modules:
- OpenUtils Library
- OpenSniff
- OpenEDB
Enhancements:
- This release fixes limitations from the previous release (0.2) and adds a set of new features.
- Sending email messages to external recipients is now possible.
- It can also fetch and create appointments, contacts, and tasks in their respective default folder.
- Experimental NEWMAIL notification support is also available.
- The openchangeclient command line messaging tool has been improved and exchange2mbox has been introduced.
- It provides a way to synchronize an Exchange mailbox with an mbox file, supports MIME types, and is able to reflect changes back to Exchange.

The MDB Tools project is a effort to document the MDB file format used in Microsofts Access database package, and to provide a set of tools and applications to make that data available on other platforms.

Specifically, MDB Tools includes programs to export schema and data to other databases such as MySQL, Oracle, Sybase, PostgreSQL, and others.

Also, included is a SQL engine for performing simple SQL queries. The 0.5 release includes an updated GUI interface (screenshot is available here). A sparse but functional ODBC driver is included as well.

MDB Tools currently has read-only support for Access 97 (Jet 3) and Access 2000/2002 (Jet 4) formats. Access 2000 support is a recent addition and may not be as complete as Jet 3 support.

Write support is currently being worked on and the first cut is expected to be included in the 0.6 release.

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.

Pachi el marciano project is a platforms game.

Pachi el marciano is a platforms game inspired by games like Manic Miner and Jet Set Willy.

The goal is to collect all the objects on each level; when this is done, the exit gate to the next stage will appear.

Pachi is a comics character created by Nicolas Radeff in 2001.

PyNOVAS allows you to calculate the position and movement of the sun, moon, planets, and stars with great precision using Python.
PyNOVAS software is based on the NOVAS software used by United States Naval Office (USNO) to produce the Astronomical Almanac and MICA. Ephemerides are supplied by the Jet Propulsion Laboratory (JPL).
You can use this software for Celestial Navigation, and also as a basis for controlling astronomical equipment.
Enhancements:
- This beta release is based on swig 1.3.24 or higher and Python 2.3 or higher.
- It has more examples, including test.py, eclipse.py, and almanac.py

Kiax is an IAX client application (a so called Softphone) which allows PC users to make ordinary VoIP calls to Asterisk servers, the same way as they do it with their hardware telephone.

Kiax aims to provide a simple and user-friendly graphical interface and desktop integration for calling, contact list, call register management and easy configuration. That is - a simple to use IAX Client.

VoIP has become a hot topic and already is a part of our life. Different standards and platforms are already in development and use: H.323 and SIP are only some of the most famous used VoIP protocols. A marvellous piece of software called Asterisk PBX (http://www.asterisk.org), developed by Mark Spenser from Digium Inc. (http://www.digium.com) proved again that the Open Source CAN PRODUCE QUALITATIVE SOFTWARE for the business and can save money with its full set of features of an advanced PBX.

In the process of the development of Asterisk a new protocol has gathered the attention among the VoIP users - the Inter-Asterisk eXchange, or IAX (TM), Protocol, used as a the native communication protocol between Asterisk PBX Servers. What is particularly good in it is that it requires only one UDP port per endpoint to create a successful communication channel for VoIP calls. This makes it much friendlier for users behind NAT, which is not the case with SIP and H.323 - they required specific router configurations for their channel establishment, thus hindering faster spread of VoIP on the home and corporate desktop.

The IAX protocol is already adopted by major VoIP providers and Telcos. If you register in Free World Dialup (http://www.fwdnet.net), IAXTel (http://www.iaxtel.com) or Freshtel (http://www.freshtel.net) or any other VoIP termination service like VoIPUser.org (http://www.voipuser.org) or PSTN Termination Provider like VoIP Jet (http://www.voipjet.com) then you may be interested in using Kiax.