Utilities

Content installer for some source games

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

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

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

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

A collection of tools to help with modding

This is a simple interpreter library for the Source Config.

Automatically makes a blank mod!

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

a collection of tools to enrich GoldSrc

selection of icons for Valve filetypes making development on windows easier

High definition pack for Half-Life and Opposing Force

For working with the same data Steam relies on

Large collection of all the typical tools used in Modding

RESGen. A tool to create .res files for Half-Life.

An assortment of java programs for working with the source engine

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

Collection of icons for valve games

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

Launch mods for Half-Life

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

PakScape is a PAK and PK3 explorer/creator

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.

Spreadsheet listing HL2 models

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

A collection of tools to help with modding

Adds TGA Thumbnails in windows

Sublime Text filter system that searches the Valve wiki for the input text

Simple movie recording tool for Source Engine games

Notepad++ syntax highlighting for Valve files

Easily recreate your gui elements in other languages

tool for converting closed-captions files for Source engine games

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

Automatically saves demos recored in source engine games

Edit the UI colors in Worldcraft

vdfplus is a small library that aims to help with converting Valve's KeyValue format to JSON and vice versa.

Source and GoldSrc Query Tool

Pak Explorer is a tool to help view and edit the contents of Qukae II PAK files

This is a simple interpreter library for the Source Config.

Parse Source SDK '.wc' files.

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

OpenGL wrapper for Direct3D

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

Generate RES files for your maps

Vice is Valve's tool for ICE encryption, a trick used mainly to protect weapon script files from modification by server admins.

A PoC library for working with the VConsole network protocol.

a tool for game replays recorded with Half-Life.

Makes starting Source based game server as easy as possible

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

Collection of simple icons for Source related content (This version is from Riintouge)

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

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

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

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

Source Engine Scripting and Administration

Checks for errors in your map

Manages custom content for steam games

Source Multi-Tool is meant as a replacement to Valves Source SDK Launcher

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

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

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

Extract the contents of VPK files

TM GCF Extractor

Debug options for HL2 Deathmatch

simple command line program that converts v13 packed addons to v12

extract gcfs

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

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