With jBroadcast you can simply broadcast messages to your players! Bukkit has /broadcast and /say built in, but they add an annoying prefix and you can't change the colour. With jBroadcast you can assign a custom command to each of the already defined ones. Other features include a new /broadcast command, where you can send any message with a predefined prefix
Features:
Permissions: Able to broadcast to the whole server: jbroadcast.broadcast Able to broadcast to the whole server with a prefix (can set in config): jbroadcast.say
(default) Commands:
Change default command: All of the commands (except reload one) can be changed in the config if they conflict with another plugin or you want to make them shorter, remember that if you change them in the config you will also have to change them in the plugin.yml found inside the jar file.
If I haven't explained it well enough let me know as a comment and I can add a video or pictures as guidance.