Free mainly software for linux

mailvisa is a bayesian spam filter, inspired by Paul Grahams A Plan For Spam. It is mainly intended for my own expirimentation, but provided here for those who are interested.
It is competitive with other bayesian filters in terms of accuracy and speed. The system is written in Ruby.
You can use, modify, and distribute mailvisa under the terms of the MIT License.
Enhancements:
- A man page has been added.

Raine is a M68000 and M68020 arcade game emulator.

Raine is an emulator, it emulates some M68000 and M68020 arcade games and is mainly focused on Taito and Jaleco games hardware.

It started as an experiment with the Rainbow Islands romset, dumped by Aracorn/Romlist. Raine can emulate many nice games now, and new games (previously unemulated) are appearing weekly.

Sound is also getting better, mainly thanks to the work of Hiromitsu Shioya

GNOME Mastermind is a Mastermind clone for GNOME Desktop.

GNOME Mastermind is a simple mastermind-like game that ive written mainly for fun and with learning purposes in spare time. Now it became quite stable and i decided to distribute it. Try it and give me some feedback.

ArahPaint4 is a textile-oriented paint program, mainly for jacquard. It is a simple paint program for raster palette images.
It has good tools for drawing images in repetition, support for handling palette images (color reduction, substitution, protected, transparent colors), contour tools, layer support, unlimited undo/redo, support for drawing in aspect ratio (pixels need not be square), a two level grid, and a coordinates display.
The project is simple, stable, fast, and works well on large images (>8000x8000).
Main features:
- it has good tools for working with reduced color images (palette)
- for color reduction
- for drawing in repeat
- for drawing in aspect ratio different than 1:1, as this is necessary for weaving
- works well with large images (8000x8000 and more)
- incorporates a nice image browser
- has unlimited undo/redo
- has keyboard shortcuts equal to Photoshop whenever possible
- has a couple of functions you will not find in any other program
- lacks thousands of functions some other programs have

Jin is an open source, cross platform, graphical client (interface) for the Internet Chess Club and the Free Internet Chess Server.
Enhancements:
- This release focuses mainly on Mac OS X related fixes, but also adds beautiful new piece sets.

Monkey Boards is a small, fast, and efficient message board systems to enable smaller Web sites to build virtual online communities where users post and reply to messages.

Compared with other projects, this defining purpose Monkey Boards much more clearer and to-the-point.

The project is different from other similar solutions mainly because it uses an SQLite database, whereas the majority currently require a MySQL server to be running somewhere. It will output clean and valid XHTML pages with external CSS stylesheets.

Chirpy! is an Open Source online quote management system. Chirpy! allows you to keep a database of quotes by friends and foes. It is most useful for quotes collected on IRC channels.
The Chirpy! project originated mainly out of frustration caused by the Rash Quote Management System, due to its numerous bugs and its lack of efficiency and extensibility. While its developers openly admit that it was a quick job, eventually, this became unacceptable.
Chirpy! is written in OO Perl, allowing for extensibility and even instant portability to non-Web platforms, uses a pluggable backend (the default being MySQL) and outputs valid XHTML 1.1 and CSS level 2.
Enhancements:
- This version features statistics,
- microsummary support,
- new CAPTCHA capabilities,
- many other improvements and fixes.

jIRleeCh project is a Java IRC client that is mainly used to ease the acquisition of XDCC packs.

It relieves the user from the need to know and type IRC commands to get XDCC Bot files or to use multiple tools and plugins to do so. It has an easy-to-use GUI interface with all the basic IRC client features.

It parses packetnews.com to search for packs. No IRC knowledge is needed to use it, as it automatically connects to a network, channel, and queues a pack.