This is a simple (but growing) plugin to send color-coded messages to a user of your server, without a trace of where they came from or who sent them. You can use it for anything from admin warnings, to haunting them with messages from Herobrine.
Just drag and drop, no configuration required. Note that you have to specify the chat format and default player name in the config if you want to use the /sendchat command.

To send a message to just one player, use /sendmsg <player> <message>
The permission is sendmessage.use

Or, send a message to everybody using /sendbc <message>
The permission is sendmessage.broadcast

Even better, do a broadcast in chat format! /sendchat [-p player] <message>
It simply loads the chat format from the configuration file, and if you specified a player with the -p flag uses that as the player, otherwise uses the default player specified in the config.yml. Example usage:
/sendchat &7What's up, players?
/sendchat -p &cHerobrine I have come to haunt you! Mwahahahahahaha!
The permission for /sendchat is sendmessage.chat

You can also reload SendMessage's config without restarting the server with /smreload
The permission is simply sendmessage.reload

If you find yourself frequently trying to remember what the color codes are, use /colors and it will tell you! No arguments, permission is sendmessage.colors, and simply returns a helpful (I hope) message informing you of the color and formatting codes.

To assist with the /sendchat command, you have /dcf, or /detectchatformat. It updates the configuration with the chat format automatically. (Note: it doesn't seem to work with VentureChat.) If you want it to update the default player to your name as well, just do `/dcf setplayer`
The permission is sendmessage.detectchatformat, but that's all there is to it!

The newest command is /sendtitle. Usage is /sendtitle <player> <title> [subtitle] <fadeIn> <duration> <fadeOut>. If you want to use spaces in the title or subtitle, use underscores and they'll be replaced with spaces. Chat colors are supported. If you'd like to use the default fadeIn, duration, or fadeOut, just put -1.
The permission is sendmessage.title

Have fun!