This plugin is mainly meant for surf maps but can be used on any. It allows a player to respawn as a ghost to walk/surf around the map so you aren't stuck in spectator mode waiting for the round to end.
Ghosts are not able to block players movements but players are able to block ghosts if they get in the way. To stop this for happening the use of a no-block plugin will help.
ConVars:
sm_redie_version - Plugin version.
sm_redie - !redie in chat to spawn as a ghost.
sm_redie_adverts - set to 0 to disable the advert.