Bukkit

When a player dies he becomes a ghost and will respawn at his location of death. A lightning effect will appear on death and on rebirth (can be turned off). The location will be marked with a sign saying "R.I.P <Playername>". The player gets a new name: "Ghost of <Playername>". Ghosts are ignored by monsters, get no damage and are excluded from PvP. In the config file can be choosen if they can use doors, levers and buttons, if they can fly or chat. Picking up items and using chests and furnaces is not possible for ghosts.

You can decide if players will drop their items like normal or if the items disappear and the player gets them upon resurrection.

To fly you have to hold crouch and steer with the mouse. Walking is not necessary. Flying is disabled by default. Also the server has to enable the fly mode in the server.properties file. That's a problem, because cheaters will be able to abuse this. If you want to protect your server I recommend using NoCheat.

Shrines can be used by players to resurrect themselves. Admins can turn anything into a shrine. Therefore you need to select an area (just like in WorldEdit) using the selection mode and a stick or your crosshair and commands. Left clicking with a stick will show admins the name of a shrine.
There are two modes (shrine only on and off): on: Ghosts have to get to a shrine to use resurrection. off: Players can bind their souls to a shrine (right click) and use the resurrection command (/res) anywhere to get resurrected.

Players can resurrect others. In the configuration can be determined how close the player has to be and if he needs a special item which will be consumed. A player can resurrect himself by right clicking a shrine or using /reb near a shrine. If reverseSpawning is enabled the player will spawn at the shrine (or at the spawn if he didn't bind his soul) and resurrection is possible at his grave.

Players can only resurrect after a specific time, or others resurrect them. You can also toggle if players can only resurrect at daytime.

Death and Rebirth has to be enabled for each world separately.

Admins have the possibility to change all options ingame. Ops can also use left clicking to get the name of a shrine.