Active Servers
CozyBlock
Simply Vanilla [Anarchy with no hacks]
Mistylands Survival Est.2010
CubedCraft - Free Servers - TNTWars - Warzone
MineCrafty - UBuild!
Bukkit Minecraft Server List
What is a Bukkit Minecraft Server?
Bukkit is a server type that allows plugins such as Bungiee to run which means multiple versions can be used to connect to the same server. This is advantagous if your computer is unable to run the lastest Minecraft Version due to performance issues.