PurpleSMP is a small survival server that feels really calm and safe. It runs the newer version of Minecraft so you can just chill build and enjoy the game without stressing about griefers or random pvp.
The server is focused on PvE and you can turn PvP on or off yourself with a command. Land claims keep your base protected and the staff log every block placed and broken so they can see what happened if someone tries to cause trouble.
There is mcMMO so you can level up skills and do fun things like faster tree chopping. You also get PlayerVaults so you have extra storage when your normal inventory is full. The server has a Bluemap so you can look at the world like a map in your browser.
They take cheating seriously and use a strong anti cheat. When someone sets it off staff get pinged right away and the plugin reacts until a staff member can check it.
PurpleSMP started as a friends only world and then opened to the public. The owner says they never plan to reset so it is meant to be a forever world where your builds can stay as long as the server is alive.

