This is a very lightweight mod that doesn't do much beyond making the all players have the glowing effect. The reason this is even a mod is because I was annoyed that I had to keep reapplying the Glowing effect to my pal while playing multiplayer since they kept dying.
If you don't know, the Glowing effect allows you to see mobs and players from long distances and through walls. This mod will help you keep track of fellow players in the world.