Planet Minecraft is a fan based website that provides projects, skins, texture packs, and more for the game of Minecraft. With SpirriCraft having launched in recent days, this is a must know for all who play the game. For those new to Minecraft, skins allow you to customise the look of your character, even for other players, while texture packs provide a whole new look and feel to the game.
Planet Minecraft is probably the number one website for third party content and is the place that I personally go to get anything I need to help enhance and improve the game. While I tend to be someone who likes to keep things relatively vanilla, I do also appreciate the use of Bukkit plugins, although that is an entirely different website altogether.