Level Creation

Adjust the light levels in a map

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.

this will pack every custom item into your map up to and including map over views

Inserts instances into a map

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

The Original official mapping utility from Valve

Edit light values inside a Maps RAD file

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

A tool for tweaking hammer settings and using multiple texture profiles

Create Displacements for your maps

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

Small collection of obfuscation techniques for maps

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.

Great little command line tool for creating a backup of your map during the compile process

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.

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

View and Edit the Entity information of a compiled BSP Map

Alternative to Hammer Editor for Level design

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.

RandMap is a random map generator for Half-Life

Useful tool for extracting the contents of BSP files

Lists maps for easy maplist.txt

A tool for compiling maps from VMF to BSP format

Small utility for helping protect bsp maps

Valve Map Extractor modified version (Successor to VMEX)

This program is a little tool for those that like the Half-Life game, with
its amazing kind of enemies and weapons.

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

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

Some Dev Texture guides to aid with level creation

A graphical interface for creating and editing Half-Life FGD Files.

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

Simple bindings for debugging maps

Batch files for killing the compile processes

Simple tool to change VTF versions from 7.5 to 7.4

Custom DLL that supports transparency in Half-Life for Steam

Identifies and archives all dependencies for bsp files.

Decrypt files that have been protected with BSPProtect (commandline)

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

hlfix is a tool that converts Worldcraft/VHE format files (.rmf) to standard .map files

Simple tool for converting world units into Hammer Units

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

Aids in nthe process of converting GoldSrc maps into Source maps

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

A tool to generate cl_leveloverview from BSP files

Generate mazes for your level in GoldSrc

The Official Editor for Valve Games

A collection of FGD's for GoldSrc

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

Alternative to Hammer

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

GUI Compiler for Source Maps

Hack the colors in WorldCraft

Random SP map generator for Half-Life

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

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

This is an modified version of VHLT v34 by Uncle Mike designed for the Xash3D engine (bsp v31)

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

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

This program adds custom content to a BSP. It is a GUI version of Valve's bspzip.

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

Free, Opensource, drop-in editor replacement for Hammer

automatically finds mapfiles to compile in the directory it is run

Frontend wrapper for netvis

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

Convert maps between Quake3 and Half-Life

BSP2OBJ is a command-line utility capable of converting Quake, Quake 2 and Half-Life map files into OBJ meshes

Multi Game Map Editor that supports Half-life

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

Alternative Map Editor for GoldSrc games

Convert Worldcraft 3.3 Maps into the Radiant Format

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

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.

Compiler and Decompiler rolled into one tool

Older free for personal use version of Terragen for sculpting landscapes

Open-source library for reading and editing BSP files

Small Tool for extracting Textures from BSPs and into WADs. Includes GUI Versions WinTextract & Textract Suite

Windows interface that frontends the compiling utilities

This tool can help you by grouping the map into VisGroups based on a grid.

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

The only native Mac OS X level editor for Quake 1