LiteBans is a lightweight banning plugin supporting UUIDs which allows temporary and permanent bans.
When a player changes their Minecraft name through Mojang, they will still keep their bans, mutes, and warnings.

All punishments made through LiteBans will take effect globally across all servers linked to the same database.
Although LiteBans is designed to effectively synchronize between hundreds of servers, it can still work alone on a single server without a MySQL database.

LiteBans can run natively under Spigot and BungeeCord, offering the same features on both platforms.
(The plugin can be installed in the Spigot plugin folder or the BungeeCord plugin folder.)