Level Creation

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

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

A tool for compiling maps from VMF to BSP format

Alternative to Hammer

integrates into Hammer and allows conversion of Source Engine units into metric or imperial units.

ZHLT rebuilt and up to date with latest engine build

A tool to assist in the compiling of source engine maps

Generates Terrain for Games

Hack the colors in WorldCraft

Create a custom light style for your goldSrc maps

Free, Opensource, drop-in editor replacement for Hammer

Batch files for killing the compile processes

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

Standalone Compiler for GoldSrc Maps

Useful tool for extracting the contents of BSP files

GUI Compiler for Source Maps

Convert maps between Quake3 and Half-Life

Decompile GoldSrc .bsp files into Hammer .map files.

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

Update to ZHLT

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

Rotates selected entity types in a map

Find, display, and optionally round floating point plane coordinates in Source engine .vmf files.

Identifies and archives all dependencies for bsp files.

The Official Editor for Valve Games

GUI frontend for Source compiling tools

Tools to aid in creation of HDR Targa files (command line)

Basic Model viewer for GoldSrc

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

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

Batch compiler for automating Map Compilation

Decompiles some BSP maps with most support for Nightfire 007

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

Valve Map Extractor modified version (Successor to VMEX)

Preview a map contained in a BSP file.

Aids in nthe process of converting GoldSrc maps into Source maps

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

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

Standalone units converter

Small application for viewing map files, Superseded by crafty

Inserts instances into a map

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

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.

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.

This is a tool for showing leaks in a map made in WordCraft.

Modified Compiler with support for large models and textures

Create an easily readable version of an FGD (commandline)

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

View and Edit the Entity information of a compiled BSP Map

Collection of various bspconv exes i have found around the net

A small VMF to JSON parser

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

Small collection of obfuscation techniques for maps

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

A collection of FGD's for GoldSrc

Convert Worldcraft 3.3 Maps into the Radiant Format

A slimmed down copy of the Source SDK 2013 map compile tools

Great little application for viewing skys used in game

Preview a map contained in a BSP file.

Well made Russian Level Editor for GoldSrc

Simple tool to change VTF versions from 7.5 to 7.4

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

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

GUI Compiler for Half-Life Maps

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

A nice tool made in 2015 which can come in handy sometimes when a bsp file is too large and wont work in BSPtoMAP.exe

Older free for personal use version of Terragen for sculpting landscapes

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

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

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

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

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

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

Generate a random map for Half-Life based on criteria you set in the application

A tool to generate cl_leveloverview from BSP files

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

The open source, cross platform level editor for id Tech games.

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

Custom DLL that supports transparency in Half-Life for Steam