Level Creation

Hack the colors in WorldCraft

Open-source library for reading and editing BSP files

Windows interface that frontends the compiling utilities

ZHLT rebuilt and up to date with latest engine build

Some Dev Texture guides to aid with level creation

Batch files for killing the compile processes

Small collection of obfuscation techniques for maps

Create a custom light style for your goldSrc maps

Rotates selected entity types in a map

Tool for compiling Maps from hammer

Collection of tools useful for mapping with GoldSrc

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

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

The open source, cross platform level editor for idtech games (GTKRadiant fork)

Worldcraft Hammer Editor Map Compiler is a set of .bat files that make the process of compiling and developing .bsp maps from .vmf files an easy and fun task.

Frontend wrapper for netvis

The Official Editor for Valve Games

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

Aids in nthe process of converting GoldSrc maps into Source maps

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

Preview a map contained in a BSP file.

Standalone Compiler for Source Maps

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

Basic Model viewer for GoldSrc

A tool to assist in the compiling of source engine maps

Quake Army Knife, multi-purpose tool for games based on or similar to the Quake engine

Convert maps between Quake3 and Half-Life

Compiler and Decompiler rolled into one tool

Adjust the light levels in a map

Well made Russian Level Editor for GoldSrc

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

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

Batch map compiler for GoldSrc

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

Standalone units converter

A small VMF to JSON parser

Generate forests within your maps based on surface type

Collection of the main tools required for mapping with GoldSrc

Simple tool to change VTF versions from 7.5 to 7.4

Entspy is program for viewing and editing the entities of compiled map

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

Modify the entities of a .map file by editing its text

Older free for personal use version of Terragen for sculpting landscapes

Decompiles some BSP maps with most support for Nightfire 007

Small prefab to help protect your map

Create Displacements for your maps

This tool blocks Hammer from converting plane coordinates to integers when exporting .map file and thus enables Hammer to output the original floating point coordinates.

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

Small application for viewing map files, Superseded by crafty

This tool is used to create the smallest convex brush containing all points in the input file. Input file can be .smd (use its vertexes), .map (brushes and point entities) or .pts file.

Decompile Source .bsp files into Hammer .vmf files. Successor to VMEX

Lists maps for easy maplist.txt

Edit light values inside a Maps RAD file

Batch compile Source and GoldSrc Maps

DirectX based application to open and view Half Life 1 game files (Source Code)

Older program used for editing entities within bsp maps

This program will help you to manage all your customs files, for your maps , texture, models or mods

automatically finds mapfiles to compile in the directory it is run

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

Similar to ZHLT for Goldsrc, it speeds up compilation for Source

Tools supporting the creation of HDR Images for the Engine

A tool to generate cl_leveloverview from BSP files

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.

Custom DLL that supports transparency in Half-Life for pre Steam WON

Custom DLL that supports transparency in Half-Life for Steam

A small collection of FGD's for Source

Quake2/3 map surface generator

Alternative to Hammer Editor for Level design

Multi Game Map Editor that supports Half-life

Convert Worldcraft 3.3 Maps into the Radiant Format

Update to ZHLT

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

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.

Generates Terrain for Games

Map Resource Extractor (MRE) is a small program that reads the VMF, and only copies the content that has been used in the map.

Random SP map generator for Half-Life

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

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

Used to take source-css console commands and convert them into .vmf-compatible commands.

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