Utilitários
Open Tibia Server by opentibia
written in C++
https://github.com/opentibia/server
Forgotten Server by otland
written in C++, based on open tibia server
https://github.com/otland/forgottenserver
PyOT by vapus
written in Python 3, based on Forgotten Server
https://bitbucket.org/vapus/pyot
(actually uses Mercurial and BitBucket but still resourceful)
Crystal Server by tryller (abandoned)
written in C++, based on forgotten server
https://github.com/tryller/crystalserver
OTX Server by mattyx14
written in C++, based on forgotten server
https://github.com/mattyx14/otxserver
OTClient by edubart
written in C++
https://github.com/edubart/otclient
YATC by opentibia (abandoned)
written in C++
https://github.com/opentibia/yatc
MapEditor by otland
written in Go
https://github.com/otland/mapeditor
Remere's Map Editor by hjnilsson
written in C++
https://github.com/hjnilsson/rme
Forgotten Map Editor by asamy45
written in Lua
https://github.com/asamy45/forgottenmapeditor
TibiaEditor by asamy45 (abandoned)
written in C++
https://github.com/asamy45/TibiaEditor
ItemEditor by Mignari
written in C#
https://github.com/Mignari/ItemEditor
ForgottenServer-ORTS by orts
written in Lua, work in TFS
https://github.com/orts/server
Alissow by comedinha
written in Lua, work in TFS
https://github.com/comedinha/Alissow
ObjectBuilder by Mignari
written in ActionScript
https://github.com/Mignari/ObjectBuilder
NewEditor by dtroitskiy
written in C++
https://github.com/dtroitskiy/NewEditor
Open Tibia Info by renatorib
written in php
https://github.com/renatorib/otinfo
Open OT List by eratsu
written in php
https://github.com/eratsu/openotlist
Flags Calculator by ranisalt
written in CoffeeScript
https://github.com/ranisalt/flags-calculator
Flags Calculator by comedinha
written in JavaScript
https://github.com/comedinha/flags-calculator