forgottenserver 
The Forgotten Server is a free and open-source MMORPG server emulator written in C++. It is a fork of the OpenTibia Server project. To connect to the server, you can use OTClient.
Getting Started
- Compiling, alternatively download nightly builds for Windows
- Scripting Reference
Mantido por www.serversoft.com.br http://www.serversoft.com.br/otserv-open-tibia-server-ots/