OpenKore / openkore

A free/open source client and automation tool for Ragnarok Online

rathena / rathena

rAthena is an open-source cross-platform MMORPG server.

HerculesWS / Hercules

Hercules is a collaborative software development project revolving around the creation of a robust massively multiplayer online role playing game (MMORPG) server package. Written in C, the program is very versatile and provides NPCs, warps and modifications. The project is jointly managed by a group of volunteers located around the world as well as a tremendous community providing QA and support. Hercules is a continuation of the original Athena project.

Flux159 / ragnarokoffline.app

Self-contained crossplatform app for playing Ragnarok Online offline — rAthena server + roBrowserLegacy client in a microVM running in electron

aethai / ro3emu-server

Open-source Ragnarok Online 3 (RO3) PC server emulator in C# / .NET 10. Client-documented protocol, multiplayer systems, tools and research.