Looking for Source Code Ressources

Hello,
I found a ~year ago nice Game Code but can´t remember where it was.
And since I also, don´t remember much of it´s content,… I am looking for:

Open Source Games on Github,Bitbucket,…
At best RPG/strategy as MMO or Browser based.
In Java or an Java like language (C#…)

I don´t want to make 1:1 copies, but for me such things are great to learn new techniques.