Free world wide software for linux

Rail World project is a 2-D train simulation game.
Rail World is a railroad train simulation game designed to bring the features of model railroading to the desktop using actual aerial or satellite photographs as the backdrop for maps.
You can control multiple trains, switches, load/unload cargo, and more.
Main features:
- Use actual aerial photographs or satellite images as the basis for maps.
- Manage multiple trains as a conductor.
- Drive trains using throttle and brake as an engineer.
- Grapple with realistic physics, including stopping distance and collisions.
- Set switches and specific train routing.
- Load and unload cargo.

CarWorld is a small driving simulator/demo I use to test various things of interest. It was mostly developed when I was a student. Car World is released with the full source code under the GNU General Public License.

The rendering

The two top pictures represent an slightly older version (v0.072) but graphically similar of CarWorld as it was presented for my project. v0.072 includes an OpenGL based renderer allowing
file input and displaying of texture mapped models with interpolated surface normals, real time projected shadows (as seen in the dino lights example).
background object
on screen command line to modify visual and simulation parameters

The mechanics

based on classical mechanics
uses standard metrics (Newtons, meters, seconds...)
there are no constraints on the environment surface
variable length time increments and variable increment number means "CarWorld time" is not dependent on frame rate.
adjustable simulation specs include: metrics, mass, moment of inertia around rotation axis, suspension pre load, compression damping, rebound damping, engine torque output, air friction, surface friction.

Safe::World can create multiple virtual instances of a Perl interpreter that can be assembled together.

SYNOPSIS

See USE section for complexer example and the test.pl script.

use Safe::World ;

my $world = Safe::World->new(
stdout => $stdout , ## - redirect STDOUT to this scalar.
stderr => $stderr , ## - redirect STDERR to this scalar.
flush => 1 , ## - output is flushed, soo dont need to wait exit to
## have all the data inside $stdout.
) ;

## Evaluate some code:
$world->eval(q`
use Data::Dumper ;
print Dumper( {a => 1 , b => 2} ) ;
`);

$world->close ; ## ensure that everything is finished and flushed.

die($stderr) if $stderr ;

print $stdout ;

$world = undef ; ## Destroy the world. Here the compartment is cleanned.

Note that in this example, inside the World is loaded Data::Dumper, but Data::Dumper was loaded only inside of it, keeping the outside normal.

Tile World is an emulation of the game "Chips Challenge". "Chips Challenge" was originally written for the Atari Lynx by Chuck Sommerville, and was later ported to MS Windows by Microsoft (among other ports).

Please note: Tile World is an emulation of the game engine(s) only. It does not come with the chips.dat file that contains the original level set. This file is copyrighted and cannot be freely distributed. The chips.dat file was originally part of the MS version of "Chips Challenge". If you have a copy of this version of the game, you can use that file to play the game in Tile World. If you do not have a copy of this file, however, you can still play Tile World with the many freely available level sets created by fans of the original game, including CCLP2.

"Chips Challenge" is a game made up of both intellectually engaging puzzles and situations demanding fast reflexes. As you might have guessed, it is a tile-based game. The object of each level is simply to get out -- i.e., to find and achieve the exit tile. This simple task, however, can sometimes be extremely challenging.

The Mana World (TMW) is a serious effort to create an innovative free and open source MMORPG. TMW uses 2D graphics and aims to create a large and diverse interactive world. The Mana World project is licensed under the GPL, making sure this game cant ever run away from you.

The project includes the development of both a client and a server, as well as the development of an online world. At the moment were making alpha releases of the client, while our server is in early development.

The eAthena free software Ragnarok Online server is used until our own server has matured enough to replace it. Once ready, well be making releases of our server too so anybody will be free to set up their own server and start building their own online world.

PodWiki is a collaborative Web-based authoring tool written in Perl which differs from other WikiWiki tools in that it uses Perl POD as its markup language.
PodWiki by Thomas Linden uses Internal Link PerlPod as its markup, which is an established language for documentation in the Perl community and well known world wide. PodWiki enhances POD a little to circumvent some lacking features (such as images or includes).
Beside POD, it also understands a shorthand markup which writes like natural text and is very easy to understand for new users. If they need more features they have to use POD; for simple pages Internal Link WikiShorthand is enough. Internal Link WikiShorthand is the default markup if nothing is defined otherwise.
PodWiki supports includes, graphics, version control (via RCS), diffs, merge-back, user/group authentication and authorization, page property inheritance, variables, attributes and a lot more. The user can use so called "formatters" to insert plain HTML or text content, which is very useful for a stylesheet or example C code. There is also a formatter for Perl code available which makes it possible to create interactive PodWiki pages (note: for security reasons this feature is turned off by default).
The big difference from other Perl WikiEngines is that PodWiki is 100% customizable, since the whole wiki site is driven by the include feature. PodWiki always loads one page ("AutoLoad"), which includes the other stuff, such as the Header, Stylesheet, Menu, the Content-Area, Edit-Bar, Footer and so forth. This allows the user to fully modify PodWikis look-and-feel.
If you are using Apache with mod_perl you can speed up PodWiki. Its fully mod_perl compliant.
PodWiki supports Internal Link authentication by users and groups. Nevertheless it is possible to work with PodWiki unauthenticated. In this case you will be logged as user anonymous. Pages can be protected for reading and/or writing for either one or more groups or for a single user. If you dont want to be logged as anonymous: Internal Link register.
Beside all those features it is still very easy to install, no need for lots of additional Perl modules or cryptic installation procedures. Just do:
./configure & make install
The configure script understands some parameters which allows tweaking the installation such as destination path or the like.
Enhancements:
- This release was relicensed under the BSD license.
- The TWiki formatter support has been abandoned, since the module contained GPL code which is no longer compatible with podwiki.

MyBook World Edition Packages project collection provides pre-compiled packages for hacking Western Digital MyBook World Edition, to improve performance and add new features.

At least intermediate Linux experience is required for playing with MyBook. Please, if you do not meet this requirement, ask someone experienced to help you. Otherwise there is a risk that you will brick your MyBook!