Free flying high software for linux

Flying Saucer project is a pure Java XML/CSS 2 renderer whose aim is to provide spec-compliant CSS 2.1 rendering for any well-formed XML document.
The current codebase can render to Java2D-based canvases and to PDF via the iText library, and covers a great deal of the CSS 2.1 specification.
There are demos for rendering XHTML, rendering within Swing applications, and rendering to PDF. Direct rendering from DocBook or other XML formats is possible, provided the appropriate CSS is available.
Main features:
- Vertical margin collapsing; CSS 2.1 specification
- Z-index property and stacking contexts; CSS 2.1 specification
- Vertical-align: top/bottom; CSS 2.1 specification
- PDF rendering via the iText library; support for PDF bookmarks, pagination and breaks, and more
- Pagination support, automatic and explicit: CSS 2.1 specification
- Rewritten "float" implementation
- Improved list marker positioning
Enhancements:
- This release includes comprehensive table support, faster rendering, bugfixes, better image generation, near-complete compliance with the CSS 2.1 specification, including lots of improvements like better forms support, CSS counters, cursor property support, compliant font property handling, and so on.
- Theres even a completely new, fast, and compliant CSS 2.1 parser built-in.

JFwadmin provides a Java high level GUI for ipchains.

JFwadmin is a Java 2 high-level X11 tool for ipchains.

The GUI displays easy-to-understand services.

Features include scripts generation, firewall save and restore, automatic interface and IP address and routes detection, current firewall configuration display, and handling of masq-modules and port-forwarding.

Kraptor is a classic shoot em up scroller game, where you must fight against tons of bad dudes.
The game offers high speed action, with massive destruction and lots of fun. Kraptor features a powerful engine for 2D shooter scroller games. Massive destruction, powerful weapons, all that you always wanted in this kind of games! It is also multi-platform (DOS, Win32, Linux and more!)
Main features:
- FULL SOURCE CODE AVAILABLE FREE (Under MIT license)
- Works on many platforms, including DOS, Windows and Linux!
- Supports all resolutions, like 320x200, 640x480, 1024x768, etc.; even those bizarre ones, like 160x120, 320x400, etc.
- Uses stereo positional sound (you hear the ships flying around you)
- Has a incredible particle system, that let all sorts of particle effects in the explosions, fire on the ground, the ships going down in flames,and the weapons can let a trail of smoke, beams, etc
- Has a dynamic fire, smoke and explosions system based on layers and on-fly rendering, that let show a massive destruction effect on the air and ground.
- Has a dynamic enviroment sub-engine to render rain, snow, etc.
- The ships explodes into pieces, and the builds on the ground blows up in a chain-explosion effect.
- Enemys of any size, and custom IAs and weapons.
- All kind of animated bad dudes, from tiny ones to big bad bosses.
- All the flying objects cast shadows over the background, with perspective correction.
- Support for animations and cinematic, with sound and subtitles.
- A on-fly translation system with UNICODE and UTF-8 support, that can translate on the fly all the GUIs to other language.
- Multiple weapons for player and enemies.
- Has original music sound-track.
- You can lower/raise the detail level, in low detail, the game runs good even on a 486 DX2!
- Original story, with cool movies.
- Realistic huge hi-res backgrounds levels.
- Original high quality stereo sounds and music
- Support for Spanish and English translation on-fly
- Black market shop to buy new weapons, upgrade ship, etc.
- GUI driven interface like the one used in Unre*l.
- You can Save / Load your game

High Level Firewall Language (hlfl) permits writing firewalling rules using a high level language. It translates your high level language firewalling rules into usable rules for IPChains, NetFilter, IPFilter, Cisco, and many others. Renaud Deraison, founder of the Nessus Project, initiated this project first, but it is now maintained by Arnaud Launay and discussed on the HLFL mailing-list.
Some examples of how HLFL works may be found in the examples section; the syntax is detailed in the syntax section.
This firewall supports the following firewalling languages:
BSD IPFw, statefull and not statefull
Cisco ACL
IPFilter
IPFWadm (Linux 2.0)
IPChains (Linux 2.2)
NETFilter/IPTables (Linux 2.4)
Enhancements:
- build-release 1.5: Update the version
- src/hlfl.c 1.45: Check cisco mask by Toshio Katayama

Facetnav is an indexing, free text search, and faceted navigation engine. It is usable as an independent service.

The project is usable in high traffic environments with huge amounts of data, along the lines of more than 100 searches a second with a data set of 100,000 objects with 10 facets

Missile of Holiday Cheer is a winter holiday vertically oriented flying finesse game.

Missile of Holiday Cheer is a game that revolves around piloting missiles bearing presents from elves workshops up to Santas low-orbiting mothership.

There are five elf groups and a number of powerups, and can be played alone or splitscreen with others.

xplanets shows a simulation of a spacecraft flying through the solar system. With the controls next to the simulation screen you can control the simulation and steer the spacecrafts flight.
The following planets are visible:
- the Sun (yellow)
- mercury (gray38)
- venus (burlywood2)
- earth (blue2)
- mars (LightSalmon3)
Note that the sizes of the sun and planets are not to scale, though their distances are. Showing the planets to scale would mean that they wouldnt be visible. The solar system is rather big, after all.
The planet nearest to the spaceship is indicated with a red circle around it. Its relative speed and distance are shown in the data display.
The xplanets program uses the GTK+ toolkit. It has been built with version 2.2.1, so it should work with any version >2.0.0. It does not work with GTK+ 1.x anymore.