Level Creation

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

Quake2/3 map surface generator

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

Standalone units converter

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

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

Older program used for editing entities within bsp maps

Simple tool for converting world units into Hammer Units

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

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

Creates .Res files for Source games running on a server

Free, Opensource, drop-in editor replacement for Hammer

Useful tool for extracting the contents of BSP files

Create Displacements for your maps

A tool to generate cl_leveloverview from BSP files

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

Convert maps between Quake3 and Half-Life

GUI Compiler for Half-Life Maps

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

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

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

Create an easily readable version of an FGD (commandline)

Decrypt files that have been protected with BSPProtect (commandline)

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

Random SP map generator for Half-Life

Hack the colors in WorldCraft

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.

Collection of various bspconv exes i have found around the net

Legacy compilation tools for quake

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

The Original official mapping utility from Valve

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

GUI Compiler for Source Maps

View and Edit the Entity information of a compiled BSP Map

Decompile GoldSrc .bsp files into Hammer .map files.

A collection of FGD's for GoldSrc

makes textfiles to go with your overview pictures from Half-Life maps.

A small collection of FGD's for Source

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

Batch compile Source and GoldSrc Maps

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 for GoldSrc games

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

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

Convert Worldcraft 3.3 Maps into the Radiant Format

Frontend wrapper for netvis

Preview a map contained in a BSP file.

A small VMF to JSON parser

Modified versions of the tools used in the Map compilation process

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

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

Update to ZHLT

Valve Map Extractor modified version (Successor to VMEX)

Well made Russian Level Editor for GoldSrc

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

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

Create a Map using color information through 2D

Batch files for killing the compile processes

Editor used for 007 Nightfire map creation

Generates displacements that would usually take an extremely long time, or just be impossible to do in Hammer.

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

The only native Mac OS X level editor for Quake 1

Modified Compiler with support for large models and textures

Edit the entities of Source and GoldSrc games

Small collection of obfuscation techniques for maps

A tool to assist in the compiling of source engine maps

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

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

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

Great little application for viewing skys used in game

Tool for compiling Maps from hammer

This program will create a half-life2 displacement map from a heightmap image.

Simple bindings for debugging maps

Older free for personal use version of Terragen for sculpting landscapes

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

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

Windows interface that frontends the compiling utilities

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

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

Q3 .map to HL2 .vmf converter