Swgemu is an emulation of an environment from Star Wars Galaxies prior to the Combat Upgrade. The process has been tough because the code for the Pre-Combat Upgrade game is no longer in use.
Star Wars Galaxies is an online role playing game(mmorpg). Players create avatars and interact in an artificial environment.
At various times throughout the projects existence, it is sometimes open source. This will allow for multiple portions to be worked on by a much larger group.