Utilities

Half-Life Launch Pad is an application to ease the process of loading mods and maps for Source and GoldSource.

VOGL is a debugger for the OpenGL rendering API intended to be used in the development of video games

Spreadsheet listing HL2 models

Tool for porting your GoldSource maps to Source. It features many fixes that will save hours of mindless work.

Sound editing tool, useful for looping by adding cues

Miscellaneous programs which use Steam data

Valve Integrated Development Environment

An ambitious attempt at providing a WYSIWYG HUD editor for Source based games

A utility that automatically generates a formatted .kv file based on your selection.

Tools for aiding in the creation of animations for view player models

OmniToolz is a tweaker made for all games out there!

Here are compiled versions of some of the tools from the source sdk released on 12/1/2004.

Compression tool used to create small files that can be transmitted by servers to gamers

Workshop tools for creating Nightfire content

Create custom shaders for Source from a node based interface

An NPM package for manipulating FGD (Forge Game Data) files.

PiLauncher lists the mods installed on your favourite games to make them easy to launch

Tools which can decompress and compress Nightfire's .007 archives.

Makes starting Source based game server as easy as possible

An assortment of java programs for working with the source engine

A PoC library for working with the VConsole network protocol.

PakRat is a graphical replacement for the BSPZIP program

Work-in-progress Linux tool for manipulating .bsp files (Used by Valve's Source Engine to store map data)

A development integration and project building tool for Source Engine modders.

An assortment of java classes for working with the source engine

Content installer for some source games

GUI frontend for BZIP2

This is a pixel shader for bloom-like effects on any Half-Life engine game.

Checks for errors in your map

A collection of tools to help with modding

FGD highlighting for Sublime Text editor

TM GCF Extractor

Simple movie recording tool for Source Engine games

HLViewer is a simple to use javascript library for viewing maps and playing replays of GoldSrc engine based games entirely in browser

Documentation for the goldsrc sdk entities

A GUI for both VTEX and studiomdl.

This tools manages your custom modifications for your Source based Steam games.

Easily recreate your gui elements in other languages

Valves VR toolkit for the HTC Vive

a free open source tool that can be used for tuning and cleaning up Steam and Source engine games.

Silence unwanted and annoying game sounds. (Half-life goldscr engine)

A half life dedicated server (goldsrc) management tool written in ruby

Source Engine based Project Cleaner - Primarily for SDK 2013 to make certain files more Linux & Mac friendly.

Development environment for Garrys mod Lua files

Extract content from game archive files

With Captioneer you can easily create your own Closed Captions for Source-based Games, like for Team Fortress 2.

Windows gadget for the source sdk

This is a simple interpreter library for the Source Config.

netdecode is a utility for parsing and analysing data within demo files produced by Valve's Source engine (only the Orange Box branch for now). This is primarily a tool for testing and reference. Poorly written in C#.

Launcher tool for Half-Life

This tool was manly made to extract out the mapname of GoldSrc- and Source Engine demofiles and place it in the name of the demofile itself.

WAD Compiler

The second release of 007 Nightfire's PC modding tools originally released many years ago including Gearcraft, Model Compiler, Map Decompiler and more.

Simple movie recording tool for Source Engine games

Benchmark which introduced some of the new and more advanced features of the Source engine and Valve's hybrid threading technology

Add thumbnail support for VTF files in windows

Generate RES files for your maps

C# library for reading/parsing & writing demo files produced by GoldSource (HL1) and Source-engine (HL2) based games

Tool (Utility) for generating .res files for GoldSource .bsp engine maps

HLLib is a package library for Half-Life that abstracts several package formats

Render smoother Source Engine videos, faster.

This is a simple interpreter library for the Source Config.

a collection of tools to enrich GoldSrc

Manages custom content for steam games

This is an all-in-one kit that comes with both Hammer 3.4 and 3.5, Auto Seamer, Batch Compiler, BSP Viewer, BSP2MAP, Crafty, GCF Scape, Leak Marker, MAP Viewer, Model Viewer, PAK Explorer, Revolver, Sprite Explorer, Sprite Fixer, Sprite Viewer, Sprite Wizard, Terrain Generator, Texture Extractor, Valve Compile Tools, Wally, WinBSPC, and ZHLT.

simple command line program that converts v13 packed addons to v12

Drop items (vpk you want to extract or folders you want to convert to vpk) onto the App Icon

A metamod plugin that allows you to write server side plugins with C# on the GoldSrc engine