QDOS and QWDOS

Finally! Play Quake and QuakeWorld online with real people on your DOS PC. No more trying to find that BWTCP driver (which only works for PPP anyways). Just simply load your packet driver and start it up! For the best experience, refer to the utilities below to help dramatically increase your video speed. QDOS and QWDOS handles most newer servers and there's even a few new commands.
Some of them include:

Chat buffer upto 32 lines
Unbindall protection.
1600x1200 VESA support. Thanks to RayeR for suggestion.
SHOW_UPTIME CVAR. See how long you've been playing :P.
SHOW_TIME CVAR. Set 1 for Military time, or 2 for 12hr AM/PM format.
(QDOS) All 5 drivers can coexist! BWTCP, IPX, MPATH, WATT32, and Serial/Modem. (Thanks to sezero of Hexen 2: HoT port).
(QDOS) CL_NODEMO. Disabled startup demos! You can also use -nodemo.
(QDOS) PQ_FULLPITCH and CL_FULLPITCH support.
(QWDOS) Menu options for V_CONTENTBLEND, NET_SHOWCHAT, and NET_SHOWGFX. These cvars will also be saved to your config.cfg.
F_VERSION reply.
(QWDOS) Players will emit a dynamic light and a spinning quad if they are typing, silver key if they are AFK, gold key if they are AFK and typing (only works on servers that support setinfo chat).
(QWDOS) Typing and AFK broadcasting to servers that support it.
(QWDOS) /AFK to manually invoke AFK mode.
(QWDOS) /NET_SHOWCHAT 1 to have the console (and top of the screen) tell you who is typing or AFK when it occurs.
(QDOS) Gun model is still drawn with FOV over 90.
(QDOS) /V_CONTENTBLEND and a menu option for it. This cvar is also saved to your config.cfg.
/JOY_RECALIBRATE so you can recalibrate your joystick on-the-fly!
/V_CONTENTBLEND 0 now functions just like gl_polyblend (i.e. disabling powerup flashes, damage flashes, etc.).
/SND_RESTART
-NOGUS parameter. Useful if you have two sound cards and want to disable initializing the Gravis Ultrasound.
Extended limits, you should be able to play most maps. (WARPSPASM mod will never be supported unless someone is willing to help with the code!)

There's more under the hood! Be sure to read the changelog.txt for more information.

Thanks to NeoZeed for the original concept. Additional thanks to Deek, LordHavoc, Sezero, Spoike, and Taniwha for their various help and snippets of code. Even extra additional thanks to FitzQuake and QuakeSpasm team for some of their code.

Latest QDOS binary - February 18, 2012
Latest QWDOS binary - February 18, 2012
QDOS Source - February 18, 2012
QWDOS Source - February 18, 2012

Tools and Utilities:

DJGPP Build Environment - Everything you need to compile!
WATT32 Libraries - Required for compile!
CWSDPMI.EXE - You need this version to play!
Fix for Gravis Ultrasound Cards - Use this if you have a repeating, "stuck" sound.
UNIRV - Custom refresh rates on DOS.
FastVid - Enable Write Combining and Linear Frame Buffering. Greatly speeds up Quake.
DOSLFN v0.40e - Long file name support for DOS. Recommended to load high.
KALI for DOS v1.4 - The great IPX to TCP/IP tunneling program. This will still connect to KALI trackers today. Change tracker ip in kali.cfg to 173.201.177.156:2213.