Utilities

Create custom shaders for Source from a node based interface

Free and open source SDK launcher for Counter-Strike: Global Offensive and other source engine games

This is a simple interpreter library for the Source Config.

Half-Life 1 Scripting and Administration

This is a set of scripts that make VMPI workers easier, vmpi is used for network distributed map compiling

Tool to aid in the creation of WAV files

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

Development environment for Garrys mod Lua files

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

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

A PoC library for working with the VConsole network protocol.

a tool for game replays recorded with Half-Life.

Ctx converter removes the hassle of having to type in correct cmd commands to decompile ctx files

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

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

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.

A GUI for both VTEX and studiomdl.

GUI frontend for BZIP2

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#.

High definition pack for Half-Life and Opposing Force

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

Launches source sdk for Portal

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

For working with the same data Steam relies on

An assortment of java classes for working with the source engine

Create cues in WAV sound files

Launch mods for Half-Life

Add thumbnail support for VTF files in windows

PakRat is a graphical replacement for the BSPZIP program

Manages custom content for steam games

OmniToolz is a tweaker made for all games out there!

Windows gadget for the source sdk

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

Resguy is similar to RESgen and FLRGen, but can find all content that Sven Co-op maps are allowed to customize and only includes what is required

Just extract this somewhere and drag your demo file onto it and it'll remove all the scoreboards and command menus from demos.

Render smoother Source Engine videos, faster.

Extract content from game archive files

This is a C# library to manage GoldSrc specific files.

Demo files to benchmark Half-Life 2

Simple movie recording tool for Source Engine games

This simple script in batch add a button in the windows context menu for create files in VPK format

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

Parse Source SDK '.wc' files.

Content installer for some source games

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

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

Source Engine Scripting and Administration

Automatically saves demos recored in source engine games

a collection of tools to enrich GoldSrc

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

A collection of tools and libraries for the Source Engine on the Xbox 360

An assortment of java programs for working with the source engine

Allows users to change the settings for the compiler(s) they wish to run

Defacto tool for extracting content from steam archives

Javascript parser for valve gui files -- ported from optf2's vgui.py

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

This new render dll's support transparent models in many new MOD's.

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.

tool for converting closed-captions files for Source engine games

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

Collection of icons for valve games

Valve Data File Parsing library.

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

Syntax highlighting for Valve formats in Sublime Text

A collection of tools to help with modding

Makes starting Source based game server as easy as possible

This Project aims to provide a parser which parses the log output of the goldsrc hlds engine (Counter-Strike, Half-Life, etc.). There is a parser written with ragel and one written by hand.

Allows console commands to be sent to source-engine games (hl2.exe). Works with text-mode clients.