The FloatingTexter works great for static text display in the air, visible everywhere. With a small adjustment it is possible to define the height of the display. This is a very nice plugin but it stopt working with the latest PMMP ALPHA11 update and it wasn’t maintained anyhow, so I switched to using the Texter plugin
Usage:
/floatingtexter or /ft | /ft add STRING /ft remove ID /ft edit ID STRING
/ft add STRING : uses the default ypos set in config.yml
/ft add INT STRING : textstring at your spawn point at ypos:INT height