Level Creation

RandMap is a random map generator for Half-Life

Small tool for generating Random Source Maps

Basic Model viewer for GoldSrc

Custom DLL that supports transparency in Half-Life for Steam

Rotates selected entity types in a map

Modified Compiler with support for large models and textures

Free, Opensource, drop-in editor replacement for Hammer

Creates .Res files for Source games running on a server

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

Update to ZHLT

View and Edit the Entity information of a compiled BSP Map

Batch files for killing the compile processes

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

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

Collection of tools useful for mapping with GoldSrc

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

Create a custom light style for your 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.

Batch compile Source and GoldSrc Maps

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

The only native Mac OS X level editor for Quake 1

Edit light values inside a Maps RAD file

A tool to generate cl_leveloverview from BSP files

Create Displacements for your maps

Adjust the light levels in a map

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

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

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

Older free for personal use version of Terragen for sculpting landscapes

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

Older program used for editing entities within bsp maps

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

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

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.

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

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

Small collection of obfuscation techniques for maps

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

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

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

Standalone Compiler for GoldSrc Maps

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

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

Simple tool for converting world units into Hammer Units

Batch compiler for automating Map Compilation

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

Small utility for helping protect bsp maps

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

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

Well made Russian Level Editor for GoldSrc

GUI frontend for Source compiling tools

GUI Compiler for Source Maps

Random SP map generator for Half-Life

Windows interface that frontends the compiling utilities

Small application for viewing map files, Superseded by crafty

Collection of various bspconv exes i have found around the net

Collection of the main tools required for mapping with GoldSrc

Lists maps for easy maplist.txt

This is the barebones program that GFlip uses as it's base

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

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

Editor used for 007 Nightfire map creation

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.

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

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

Open-source library for reading and editing BSP files

Inserts instances into a map

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

Convert Worldcraft 3.3 Maps into the Radiant Format

Alternative Map Editor for GoldSrc games

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

Batch map compiler for GoldSrc

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

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

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

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

Q3 .map to HL2 .vmf converter

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