For help getting started, see the online documentation in the wiki. You need to provide your own game IWAD. If you do not have a copy of a doom-engine game, the easiest way to obtain them is to purchase them from Steam or GOG. When you download them from either of these stores, ZDoom will automatically find them.
This is the source code for ZDoom 2.8.0. It has been compressed with 7-Zip. If you don't already have that, you'll need to get it before you can open the archive.
Want a simple launcher to make using ZDoom easier? Try this.
ACS script compiler for use with ZDoom and/or Hexen. This is not the version of ACC released by Raven. It supports all off ZDoom's language extensions.
This is the version of ACC you almost certainly want to download.
This version of ACC is only if you're old-school and using WadAuthor or a DOS-based editor like ZETH.
This is the latest source code for my version of ACC. It includes both a makefile for GCC and a project file for Visual C++ 6, so you can build a Windows, DOS, or Linux version.
This is a standalone version of ZDoom's internal node builder. Its most important feature is that it knows about polyobjects, but it can also build GL nodes if you don't want to wait for glBSP to do it. At the time of writing, it is also the only nodebuilder with UDMF support.
This is the source code for ZDBSP 1.19. The build system uses CMake, so you can generate project files for any version of Visual C++ from 6 up or several other IDEs, or you can create Makefiles as well.
This package contains both a Windows binary and source code.
A DETH-based editor for ZDoom that runs in a DOS box. Comes with minimal documentation. If you don't already know how to use DETH, you should go find a good tutorial that explains it. If you plan on doing any ACS scripting, you should be sure to also download ACC below.
This is the source code for ZETH. Hopefully somebody will find it useful.
Shows off some of the features that were new as of ZDoom 1.22.
Includes the programs zwadconv, swantbls, and listacs. Zwadconv converts old maps to the Hexen format used by ZDoom natively. Swantbl creates SWITCHES and ANIMATED lumps used by BOOM. Listacs is an ACS script disassembler (not decompiler).
Contains the source code for the editing utilities.