Level Creation

Generate mazes for your level in GoldSrc

VSIF2VCD is a command line scenes.image extractor/decompiler.

The Calliper editor (formerly Crowbar) is designed to be a cross-platform, extensible level editor that accelerates the creation of computer game maps, and is targeted specifically at Source engine games.

C# library that will parse Quake/Half-Life MAP files

Valve Batch Compile tool (VBCT) is a source map Compile tool

Decompile GoldSrc .bsp files into Hammer .map files.

Standalone Compiler for Source Maps

Generate forests within your maps based on surface type

Rotates selected entity types in a map

Preview a map contained in a BSP file.

Simple tool to dump raw data from Valve's map files.

The only native Mac OS X level editor for Quake 1

Valve Map Extractor, Decompile BSP maps for source (original version)

Color Correct is a 3DS Max texture plug-in which alters the colors of any texture

Well made Russian Level Editor for GoldSrc

Crafty is a 3D object, material, model and file browsing utility for Source & GoldSrc Maps.

Great little application for viewing skys used in game

Analyzes and reports on errors in the map compilation process

Batch compiler for automating Map Compilation

Windows interface that frontends the compiling utilities

Simple tool for converting world units into Hammer Units

Standalone units converter

Batch files for killing the compile processes

Contains 3 Tools, BSP_View, BSP_Tool and BSP_Slicer all of which perform useful tasks on Half-Life Maps

Tool for compiling Maps from hammer

Joiner is a little application that reads in a template .vmf file and produces a new .vmf filled with supports based on your template and customised settings or config.

Preview a map contained in a BSP file.

Identifies and archives all dependencies for bsp files.

GUI Compiler for Source Maps

Small collection of obfuscation techniques for maps

Convert .BSP files to .MAP files & Extract files from .PAK or .SIN files

Inserts instances into a map

Free, Opensource, drop-in editor replacement for Hammer

Quake2/3 map surface generator

Small utility for helping protect bsp maps

The Official Editor for Valve Games

Simple tool to change VTF versions from 7.5 to 7.4

A modified version of VBSP designed to greatly increase the maximum width and length of visleaves.

ZHLT rebuilt and up to date with latest engine build

Useful tool for extracting the contents of BSP files

It is another type of solid which is perfect for creating terrain. A plugin for Hammer

Collection of tools useful for mapping with GoldSrc

Allows you to create interesting 3D shapes without going through all the hassle of vertex manipulation

A tool to generate cl_leveloverview from BSP files

This is a tool I made to create huge forests in Source maps (It should work with any source game!)

Modification of Source Valve Hammer Editor to fix some issues. Fixes brush vertex precision loss.

Decompiles some BSP maps with most support for Nightfire 007

HammerMate is a tool I use to save and load the wad texture list for Hammer 3.4 / 3.5.

Multi Game Map Editor that supports Half-life

Removes entity names from your map and helps prevent people from stealing your work

Older free for personal use version of Terragen for sculpting landscapes

Map viewer for Valve's GoldSrc engine (needs to be compiled)

Basic Model viewer for GoldSrc

Alternative Map Editor mainly used for Quake 2 but compatible with GoldSrc

View and Edit the Entity information of a compiled BSP Map

Custom DLL that supports transparency in Half-Life for Steam

Simplest Pak extractor ever. Just pick a map and click the button

Random SP map generator for Half-Life

List Maker automatically generates your maplist.txt and mapcycle.txt, it can be further used for making lists outside of Maplist making.

a 3D Shape Generator for the Quake & Half-Life Map Format

Alternative Map Editor for GoldSrc games

Another great tool from RedMser which tracks Hammers compilation progress even when it seems to hang

Adjust the light levels in a map

C# Library for working with BSP files (and other similar file formats).

This is Badger. It's a tool to generate levels for Half-Life 2, Black Mesa.

A tool for compiling maps from VMF to BSP format

A small VMF to JSON parser

A collection of JavaScript functions to load Goldsource and Source map files and render them. Not an editor.

Standalone Compiler for GoldSrc Maps

Update to ZHLT

Optimizes the entities in compiled maps, allowing you to include more entities and also reduce network traffic.

This is a modified VBSP that does not delete prop_static entities using models with propdata

OGLE is a rather amazing 3d tool that can extract shapes from 3d scenes being rendered on a computer screen

converts Minecraft files into vmf files

Modified Compiler with support for large models and textures

Collection of the main tools required for mapping with GoldSrc

Compiler and Decompiler rolled into one tool

Displays all options for, and facilitates, compiling maps for Nightfire

Collection of various bspconv exes i have found around the net

fixes the annoying Navigation Mesh was built using a different version of this map