Welcome to the betascollector's OS Discussion
I Will make my OS discussion here and everybody can tell your OS Projects.

Let's start:
I will make project OS named "Microsoft Jaguar Project" that is based on Windows 3.1/Windows 3.11.
What application that can edit 16-bit Windows 3.1 software?
EDIT: Using Borland Workshop!

i'm messing around with XP SP3+
gonna try merge and port Plex A and C into it
and for my own amusement call it M1 of Longhorn

(just killing time)
it wont be anything official, just private play

i'm gonna start working on a project. still haven't came up with a name for it yet. it's just for fun. no idea what i'm really gonna do with it. i'm decided it will either be based on Windows XP SP2/SP3, Fedora, Slackware, or Arch Linux. i haven't decided yet. i'll probably go with XP since it will support a ton of software.

but that's it so far. it's in planning stages atm. might start working on it today.

Go with a free Linux distro, (yes, there seem to be non-free ones,) & look for free alternative software to what what only XP would have, for legality.

I am trying to make a lite version of Windows Longhorn. I am willing to edit 4074, but I may have to edit 4051, but they are basically the same anyways

decided to dump Plex A and C in favor of Concept Video look
managed to make Plex template msstyle and XP accepts it
now only images

if i find some reg keys for explorer it might even look pretty nice at the end

I Geuss I'm trying to Make A Custom OS based on either:
Windows 2000 or XP (But the first test has become XP)

Its called Gamma OS

What you waiting for! The BetasCollector's Bootdisk Project is coming to BetaArchive and Custom OS Forums!

What I should put this on file type like ISO?

I'm developing a ReactOS-based OS on http://nw-os.de.vu , you can get downloads at http://nw-os.square7.ch/files.html

I've made custom versions of these, for production use.

1. Windows 3.11 (since 1995), Windows 3.0 + Word 2.x + exasp 4.0
2. PC DOS 6.3, 7.0,
3. Windows NT 4.0

These are current projects

MS-DOS 6,22/7.10 (with various kernels), PC-DOS 7.1/7.00/6.30

I built a fully slipstreamed PC-DOS 6.30 (look at it on vetusware!).