The Official Discord Server
libGDX also has a friendly Discord community. There are a number of channels, including but not limited to: screenshot sharing, question & answers, and Kotlin discussions.
Game Jams
Our community regularly offers game jams for libGDX centered around different themes. These are ideal oppurtunities to get to know both libGDX and our community.
Forum
Our forums have been archived due to spam issues, but can still be used as reference.
IRC
Our community used to be on IRC, but nowadays we are active on Discord.