GRUB for DOS is a rebuild of the GNU GRUB boot manager for DOS, and can be run under real mode DOS. It also has many new features. For example, it can be booted through BOOT.INI of Windows (grldr) and kexec of Linux (grub4lin).

GPL Arcade Volleyball is an SDL remake of the old dos game Arcade Volleyball for several platforms (currently Linux, Windows, BeOS and Mac OS X are supported).

UltimateStunts will be a remake of the famous DOS-game "stunts". This DOS-game, which was released in the early 1990s, can be downloaded on several abandonware sites, e.g. the XTC site .

Einstein puzzle is a free cross-platform open source remake of old DOS game Sherlock which was inspired by Albert Einsteins puzzle. Einstein said that only those with an intelligence quotient of 98 percentile and higher should be able to solve it.

GRX is a library for 2D graphics, originaly written by Csaba Biegl for DJ Delories DOS port of the GCC compiler. Now it support DOS (using the DJGPP v2 compiler), Linux console, X11 and Win32 (using the Mingw compiler).

RIG is a program I wrote to replace a particularly poor closed-source unattributed public-domain implementation for MS-DOS.

FreeVikings game reimplements the DOS game Lost Vikings.

blueMail is a multi-format offline mail reader for Unix, DOS, Win32, and other systems.

BlockOut II is a free adaptation of the original BlockOut DOS game edited by California Dreams in 1989. BlockOut II has the same features than the original game with few graphic improvements.

Linux Snipes project is a text-based maze game based on an old DOS game. You are in a maze with a number of enemies (the "snipes") and a few "hives" which create more of the enemies.

Castle-combat is a clone of the old DOS game Rampart. Up to four players build castle walls, place cannons inside these walls, and shoot at the walls of their enemy(s). If a player cant build a complete wall around one of his castles, he loses.

Lcal is a multi-platform (Unix/Linux, DOS, DOS+DJGPP, Windows+Cygwin) program which generates full-year PostScript lunar (moon phase) calendars in a 2-page format, a compressed 1-page format, or an odd-days-only 1-page format.

SoundTracker is a music tracking tool for X11 / Unix similar in design to the DOS program FastTracker and the Amiga legend ProTracker. Samples can be lined up on tracks and patterns which are then arranged to a song.

Mtools is a collection of utilities to access MS-DOS disks from Unix without mounting them. The project supports Win95 style long file names, OS/2 Xdf disks and 2m disks (store up to 1992k on a high density 3 1/2 disk).

Openglad project is a SDL port of the old (and recently open-sourced) DOS game Gladiator. Openglad is an SDL port of an old DOS game called Gladiator, which was developed by FSGames in the mid 90s.

FreeDOS aims to be a complete, free, 100% MS-DOS compatible operating system. Mostly achieved except Windows compatibility - Windows standard-mode works on FreeDOS, but 386-mode / WfW 3.11 does not..

Zip is a compression and file packaging utility for Unix, VMS, DOS, OS/2, Windows 9x/NT, Amiga, Atari, Macintosh, BeOS, SMS/QDOS, MVS, VM/CMS, and others.

glFlow is a (D)DoS logger written with speed in mind. glFlow detects attacks on high speed links through real-time flow aggregation and analysis. What do I run it on ? It was written on FreeBSD and tested on both FreeBSD and Linux.

PDCurses is a public domain curses library for Win32, DOS, OS/2 and X11, implementing most of the functions available in System V R4 curses. PDCurses for X11 supports most compilers for these platforms.

Panoptis plans to create a network security tool (N-IDS) to detect and block DoS and DDoS attacks. The programming language is C++, and the input is being provided by routers. First, you need a router that exports NetFlow(TM) data.