WebHL is a fork of hlviewer.js that uses the File System Access API to load game assets direct from your computer rather than from a server.

Advanced Quake Sounds For AMX Mod X — https://forums.alliedmods.net/

Cheat for goldsrc based games on Linux. Dynamic loaded library

This package is designed to obtain information from the demo of the servers or games on the Half-Life 1 engine

GoldSource Engine Renderer SDK for Delphi

Master Sword: Continued (Classic)

Continuation of Master Sword Classic/Continued.

Grey Source 2021

A Master Server for some of Valve's games written in Go.

Send Rcon Commands to Gold Souce based Games (HL1) from Discord.

Half-Life 1 GoldSrc style engine with BSP v30 and WAD3 map support

Various tutorials and configuration files for Gameservers.

https://forums.alliedmods.net/showthread.php?t=161175

A fantasy RPG modification for Half Life

HGSM-HattrickGameServerManager

HL1/ HL2 Rcon Studio

A library for parsing GoldSrc demo files

A repository containing most of the known versions of Counter-Strike pre-1.6, already extracted and ready for Windows & Linux.

BOTs for HL1 MOD Contra-Force 1.4b and Sven co-op 4.8. Based on Jeffrey´s HPB Bots v3.0

Customized AMXBans